Chemistry 11

+1 Chemistry

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Class 11 FULL Chemistry

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Elements which occupied position in the lother meyer curve, on the peaks, were :–

1. Highly electro positive elements

2. Alkali metals

3. Elements having large atomic volume

4. All

A crystalline solid

1. Has no define melting point

2. Undergoes deformation of its geometry easily

3. Has an irregular 3-dimensional arrangements

4. Changes abruptly from solid to liquid when heated

Which of the following has incorrect direction of Inductive effect.

1. Only 2

2. Only 3

3. Only 1

4. Only 4

Which of the following are arranged in increasing order of solubilities?

1. CaCO₃ < KHCO₃ < NaHCO₃

2. CaCO₃ < NaHCO₃ < KHCO₃

3. NaHCO₃ < KHCO₃ < CaCO₃

4. CaCO₃ < NaHCO₃ < KHCO₃

A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is ______.

1. 1, 1-dibromopropane

2. 1, 4-dibromobutane

3. 2, 2-dibromobutane

4. 1, 2-dibromoethane

Thermal stability of alkaline earth metal carbonates in decreasing order is

1. BaCO₃ > SrCO₃ > MgCO₃ > CaCO₃

2. BaCO₃ > SrCO₃ > CaCO₃ > MgCO₃

3. MgCO₃ > CaCO₃ > SrCO₃ > BaCO₃

4. CaCO₃ > SrCO₃ > MgCO₃ > BaCO₃

In which of the following cases does the reaction go farthest to completion.

1. K = 103

2. K = 1

3. K = 10

4. K = 10-2

Which salt of heating does not give brown coloured gas?

1. AgNO₃

2. KNO₃

3. PbNO₃

4. LiNO₃

The percentage of para hydrogen in ordinary hydrogen increases when:

1. Temperature is lowered

2. Pressure is increased and temperature is decreased

3. Temperature is increased

4. None of these

19.7 kg of gold was recovered from a smuggler. How many atoms of gold were recovered?
(Au =197)

1. 100

2. 6.02 × 1025

3. 6.02 × 1023

4. 6.02 × 1024

Which of the following is always a whole number

1. Equivalent weight

2. Atomic weight

3. Atomic number

4. Atomic radii

Blackened oil painting can be restored into original form by the action of

1. H₂O₂

2. BaO₂

3. Chlorine

4. MnO₂

Oxidation numbers of two Cl atoms in bleaching powder, CaOCl2 are

1. + 1, – 1

2. – 1, – 1

3. + 1, + 1

4. 0, – 1

In O₂ and H₂O₂, then O-O bond lengths are 1.21 and 1.48Å respectively. In ozone, the average O-O bond length is

1. 1.28 Å

2. 1.52 Å

3. 1.18 Å

4. 1.44 Å

Which of the following products are obtained when BCl₃ reacts with water ?

1. B₂O₃ + HCl

2. B₂H₆ + HCl

3. B₂H₅Cl + H₂

4. B(OH)₃ + HCl

Thermal stability of hydrides of first group elements follows the order

1. LiH > RbH > KH > NaH

2. RbH > KH > NaH > LiH

3. LiH > NaH > KH > RbH

4. LiH > KH > RbH > NaH

What is the oxidation number of Co in [Co(NH3)4 ClNO2]

1. + 4

2. + 2

3. + 5

4. + 3

The agricultural field that produces maximum methane gas into atmosphere is

1. Cotton field

2. Wheat field

3. Groundnut field

4. Paddy field

Which are correct match :-
(a) Eka silicon – Be (b) Eka aluminium – Ga
(c) Eka mangenese – Tc (d) Eka scandium – B

1. a, d

2. All

3. b, c

4. a, b, d

The acidified solution of FeCl₃ is reduced by passing:

1. O₂

2. nascent H

3. ordinary H₂

4. H₂

The major binding force of diamond is

1. covalent bond

2. dipole-dipole attraction

3. ionic bond

4. induced dipole-dipole attraction

One of the following is the chief source of water and soil pollution

1. Thermal power stations

2. Agro industry

3. Mining

4. All of these

Mesomeric effect involves the delocalisation of :

1. 𝝿 electrons

2. Protons

3. Sigma electrons

4. None of these

The number of electrons in the atom which has 20 protons in the nucleus is

1. 30

2. 20

3. 10

4. 40

Which of the following sets of elements follows Newland's octave rule :-

1. Na, K, Rb

2. Be, Mg, Ca

3. B, Al, Ga

4. F, Cl, Br

Which of the following is an amphoteric hydroxide?

1. Mg(OH)₂

2. Ca(OH)₂

3. Sr(OH)₂

4. Be(OH)₂

In transforming 0.01 mole of PbS to PbSO₄, the volume of ’10 volume’ H₂O₂ required will be

1. 33.6 mL

2. 22.4 mL

3. 11.2 mL

4. 44.8 mL

A signature written with carbon pencil weights 1 mg. What is the number of carbon atoms present in the signature?

1. 5.02 × 1023

2. 6.02 × 1020

3. 0.502 × 1020

4. 5.02 × 1020

The electronic configuration of metal M is 1s2, 2s2, 2p6, 3s1. The formula of its oxide would be

1. M₂O

2. M₂O₃

3. MO

4. MO₂

Oxidation state of Fe in Fe3O4 is

1. 3/2

2. 4/5

3. 8/3

4. 5/4

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

1. -SO₃H

2. -COOH

3. -C ≡ N

4. -NO₂

Which of the following reactions produces hydrogen?

1. Na₂O₂ + 2HCl

2. Mg + H₂O

3. BaO + HCl

4. H₂S₄O₈ + H₂O

The elements which are cited as an example to prove the validity of mendeleev's periodic law are

1. Zr, Hf

2. Co, Ni

3. Ga, Sc

4. H, He

Which is not characteristic of 𝛑-bond:

1. 𝛑-bond results from lateral overlap of atomic orbitals

2. 𝛑-bond may be formed by the overlapping of p-orbitals

3. 𝛑-bond are formed from hybrid orbitals

4. 𝛑-bond formed when a sigma bond already formed

The nucleus of the element having atomic number 25 and atomic weight 55 will contain

1. 55 protons

2. 25 protons and 30 neutrons

3. 55 neutrons

4. 25 neutrons and 30 protons

Which pair does not show hydrogen isotopes?

1. Deuterium and tritium

2. Protium and deuterium

3. Ortho hydrogen and para hydrogen

4. Tritium and protium

If the table of atomic masses were established with the oxygen atom and assigned value of 100, then the mass of
carbon atom would be, approximately :-

1. 50

2. 24

3. 75

4. 112

Which overlapping in involved in HCl molecule:

1. s – s overlap

2. s – d overlap

3. s – p overlap

4. p – p overlap

Similarity of fluorine and oxygen may not be attributed to

1. Their atomic and ionic radii are closely similar

2. Both form stable p𝛑 - p𝛑 multiple bonds with themselves

3. Both of them are highly electronegative elements

4. The atom of both elements attain an octet of electrons in their valence shell

Which of the following is not true?

1. Reaction between H₂ and Cl₂ is much faster than D₂ and Cl₂

2. Ordinary water is electrolysed more rapidly than D₂O

3. Bond dissociation energy for D₂ is greater than H₂

4. D₂O freezes at lower temperature than H₂O

An element having atomic number 25 and atomic
weight 55 will have –

1. 55 protons

2. 55 neutrons

3. 25 protons and 30 neutrons

4. 25 neutrons and 30 protons

The H − O − O bond angle in H₂O₂ is

1. 97°

2. 109.28°

3. 104.5°

4. 107.28°

Which statement is correct regarding Inductive effect ?

1. I effect increases with increase in the distance

2. Implies transfer of lone pair of electron from more electronegative atom to the less electronegative atom

3. Complete transfer of one of the shared pair of electrons to one of the atom joined by a double bond

4. Electron displacement along a carbon chain and develops partial charges on atoms

Which of the following will weigh maximum amount-

1. 1.135 litre of He at STP

2. 40 g iron

3. 1 × 1023 atoms of carbon

4. 1.2 g atom of N

Oxidation number of Mn in K2MnO4 and MnSO4
are respectively

1. + 5, + 2

2. + 6, + 2

3. + 2, + 6

4. + 7, + 2

The atomic number of an element represents

1. Atomic weight of element

2. Valency of element

3. Number of protons in the nucleus

4. Number of neutrons in the nucleus

The angle strain in cyclobutane is

1. 29°16

2. 19°22

3. 9°44

4. 24°44

The boiling points of the following hydrides follow the order

1. SbH₃ > NH₃ > AsH₃ > PH₃

2. NH₃ > SbH₃ > AsH₃ > PH₃

3. SbH₃ > AsH₃ > NH₃ > PH₃

4. NH₃ > PH₃ > AsH₃ > SbH₃

Presence of a nitro group in a benzene ring

1. Deactivates the ring towards electrophilic substitution

2. Renders the ring basic

3. Activates the ring towards electrophilic substitution

4. Deactivates the ring towards nucleophilic substitution

The Initial pressure of COCl2 is 1000 torr . The total pressure of the system becomes 1500 torr when the equilibrium
COCl2 (g) ⇌ CO (g) + Cl2 (g) is attained at constant temperature.
The value of Kp of a reaction is

1. 2500

2. 500

3. 1000

4. 1500

For CaCO₃(s) ∆ CaO(s) + CO₂(g) at 977°C, ∆H = 174 KJ/mol; then ∆E is -

1. 163.6 KJ

2. 160 KJ

3. 180 KJ

4. 186.4 KJ

What is the oxidation number of sulphur in Na2S4O6

1. 3/5

2. 3/2

3. 5/2

4. 2/3

The increasing thermal stability of the hydrides of group 16 follows the sequence :

1. H₂Se, H₂S, H₂O, H₂Te

2. H₂Te, H₂Se, H₂S, H₂O

3. H₂O, H₂S, H₂Se, H₂Te

4. H₂S, H₂O, H₂Se, H₂Te

Which of the following is a molecular crystal ?

1. Ice

2. Graphite

3. SiC

4. NaCl

The alkali metal that reacts with nitrogen directly to form nitride is

1. Rb

2. K

3. Na

4. Li

Which of the following alkyl group has the maximum +I effect ?

1. (CH₃)₃C–

2. CH₃CH₂–

3. CH₃–

4. (CH₃)₂CH–

In which of the following molecule, the mesomeric effect is not with the benzene nucleus ?

1. Only 2

2. Only 3

3. Only 1

4. Only 4

Which substance cannot be reduced by H₂O₂?

1. K₂Cr₂O₇/H₂SO₄

2. Fe3+

3. Ag₂O

4. KMnO₄/H₂SO₄

Which position for hydrogen explain all its properties?

1. At the top of halogen

2. At the top of carbon family

3. At the top of alkali metals

4. None of these

H₂ acts as an oxidant in its reaction with:

1. N₂

2. Ca

3. Br₂

4. S

Isopropyl bromide on Wurtz reaction gives

1. 2, 3 – Dimethylbutane

2. Hexane

3. Propane

4. Neohexane

Identify the statement that is not correct as far as structure of diborane is concerned.

1. There are two bridging hydrogen atoms and four terminal hydrogen atoms in diborane.

2. All B-H bonds in diborane are similar.

3. The hydrogen atoms are not in the same plane in diborane.

4. Each boron atom forms four bonds in diborane.

The reactivity of hydrogen atom in an alkane towards substitution by bromine atom is :

1. 2°H > 3°H > 1°H

2. 3°H > 1°H > 2°H

3. 1°H > 2°H > 3°H

4. 3°H > 2°H > 1°H

Which of the following oxides is amphoteric?

1. BeO

2. MgO

3. CaO

4. BaO

In which of the following molecule, the mesomeric effect is present ?

1. Only 3

2. Only 1

3. Only 4

4. Only 2

An atom which has lost one electron would be

1. Electrically neutral

2. Negatively charged

3. Carry double positive charge

4. Positively charged

Which of the following gives CO₂ on heating?

1. Rb₂CO₃

2. Na₂CO₃

3. Li₂CO₃

4. K₂CO₃

When CO₂ is passed through solution of calcium hydroxide, which one of the following compounds is precipitated?

1. Ca(HCO₃)₂

2. CaO

3. CaCO₃

4. Ca(OH)₂

The first fraction obtained during the fractionation of petroleum is:

1. Diesel Oil

2. Kerosene Oil

3. Hydrocarbon Gases

4. Gasoline

Hydrogen loses its electron to form H+ion. In this respect it resembles to:

1. Transition metals

2. Halogens

3. Noble gases

4. Alkali metals

The fraction of volume occupied by the nucleus
with respect to the total volume of an atom is

1. 10-5

2. 10-10

3. 10-15

4. 10-30

Which of the following acts as a sink for CO?

1. Microorganisms present in the soil

2. Oceans

3. Haemoglobin

4. Plants

When KMnO4 is reduced with oxalic acid in acidic solution, the oxidation number of Mn
changes from

1. 7 to 4

2. 7 to 2

3. 4 to 2

4. 6 to 4

The number of electrons in one molecule of CO₂ are

1. 22

2. 88

3. 44

4. 66

For the system S(s) + O₂(g) ➜ SO₂(g) -

1. ∆H > ∆E

2. ∆H = ∆E

3. ∆E > ∆H

4. ∆H = 0

Which of the following is strongest base?

1. Si(OH)₄

2. Al(OH)₃

3. Mg(OH)₂

4. Be(OH)₂

Which of the following statement is false :-

1. Elements of ns2 np6 electronic configuration lies in 1st to 6th period

2. The seventh period will accommodate thirty two elements

3. Boron and silicon are diagonally related

4. Typical elements lies in 3rd period

Which of the following elements have the greatest tendency to form covalent compounds?

1. Be

2. Mg

3. Ca

4. Sr

Atomic radius is of the order of 10-8 cm and
nuclear radius is of the order of 10-13 cm.
Calculate what fraction of atom is occupied by
nucleus ?

1. 10-12

2. None of these

3. 10-20

4. 10-15

Inductive effect involves :

1. displacement of 𝝿-electrons

2. delocalisation of σ-electrons

3. delocalisation of 𝝿-electrons

4. displacement of σ-electrons

The oxidation state of Cr in Cr2O72- is

1. – 6

2. 4

3. 6

4. – 2

Which of the following set of elements belongs to same period :-

1. K, Ca, Ag

2. None

3. Zn, Cd, Hg

4. Fr, Ra, U

In which reaction there is a change in valency

1. 2NO₂ + H₂O → HNO₂ + HNO₃

2. NH₄OH → NH₄+ + OH-

3. CaCO₃ → Ca +Co₂

4. 2NO₂ → N₂O₄

For the gas phase reaction , 2NO (g) ⇌ N2(g) + O2(g) , ∆H = -43.5 K cal , which one of the following is true for
N2(g) + O2(g) ⇌ 2NO(g)

1. K varies with addition of NO

2. K is independent Of T

3. K increases as T increases

4. K decreases as T decreases

Which pair of successive elements follows increasing order of atomic weight in mendeleev's periodic table

1. Lithium and Beryilium

2. Argon and potassium

3. Cobalt and nickel

4. Tellurium and iodine

In a period the elements are arranged in :–

1. Increasing order of nuclear charge

2. Decreasing order of nuclear charge

3. In order of same nuclear charge

4. Decreasing order of No. of electrons

What is the indicator of pollution in water?

1. Amount of BOD

2. Amount of hydrogen

3. Amount of oxygen

4. Amount of nitrogen

The basic character of the oxides, MgO, SrO, K₂O, NiO, Cs₂O increases in the order

1. Cs₂O < K₂O < MgO < SrO < NiO

2. K₂O < NiO < MgO < SrO < Cs₂O

3. MgO < SrO < K₂O < NiO < Cs₂O

4. NiO < MgO < SrO < K₂O < Cs₂O

Identify the wrong statement in the following:

1. Acid rain is mostly because of oxides of nitrogen and sulphur

2. Chlorofluorocarbons are responsible for ozone layer depltion

3. Greenhouse effect is responsible for global warming

4. Ozone layer does not permit infrared radiation from the sun to reach the earth

Decreasing –I effect of given groups is :
(i) –CN (ii) –NO₂ (iii) –NH₂ (iv) –Cl

1. iii > ii > iv > i

2. ii > i > iv > iii

3. ii > iii > iv > i

4. iii > ii > i > iv

𝛑-bond is formed:

1. By p – p collateral overlapping

2. By overlapping of hybridized orbitals

3. Head on overlapping of p – p orbitals

4. Overlapping of s – s orbitals

The lowest alkene, that is capable of exhibiting geometrical isomerism is

1. But – 1– ene

2. Ethene

3. Propene

4. But – 2 – ene

Oxidation number of S in S2Cl2 is

1. + 6

2. 0

3. – 1

4. + 1

Which of the following compounds will exhibit geometrical isomerism?

1. 2 – Phenyl – 1 butene

2. 3 – Phenyl – 1 – butene

3. 1 – Phenyl – 2 – butene

4. 1, 1 – Diphenyl – propene

Fluorosis, the bone disease, is caused by the presence of

1. Fluorides in water

2. Carbon monoxide in air

3. Pesticides in water

4. Sulphur dioxide in air

Which alkali metal has highest tendency for half reaction; M(g) → M+(aq) + 1e-?

1. K

2. Na

3. Li

4. Cs

The equilibrium constant for the reaction N2 (g) + O2 (g) ⇌ 2NO(g) is 4 × 10-4 at 2000K . In presence of a catalyst ,
equilibrium is attained ten times faster . Therefore , The Equilibrium constant in presence of the catalyst at 2000K is

1. 4 × 104 × 10-4

2. 4 × 104 × 10-5

3. 4 × 10-3

4. Difficult to compute without more data

Which statement is wrong for the long form of periodic table :-

1. Lanthanides and actinides are placed in same group

2. No. of valence shell electrons in a period are same

3. Number of periods are 7 and groups 18

4. IIIrd B group contains 32 elements

Which of the following statement is wrong :-

1. 3rd period contains 18 elements

2. In p–block, metal, nonmetal and metalloids are present

3. 1st period contains two non metals

4. 2nd period contain 8 elements

The solubility of hydroxides of alkaline earth metals increases down the group because

1. The decrease in lattice energy is less prominent than the decrease in hydration energy

2. The decrease in lattice energy is more prominent than the decrease in hydration energy

3. Lattice energy increases and hydration energy decreases as one move from Be2+ to Ba2+

4. The salts become less ionic

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Class 12 FULL Chemistry

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The number of molecules of the reactants taking part in a single step of the reaction is indicative of

1. moleclarity of a reaction

2. half-life of the reaction

3. fast step of the mechanism of a reaction

4. order of a reaction

On oxidation with a mild oxidising agent like Br₂/H₂0, the glucose is oxidized to

1. saccharic acid

2. valeric acid

3. glucaric acid

4. gluconic acid

A colloidal system is which liquid is dispersed phase and solid is dispersion medium is classified as

1. gel

2. emulsion

3. aerosol

4. sol

The molar conductance at infinite dilution of AgNO₃, AgCl and NaCl are 116.5, 121.6 and 110.3 respectively. The molar conductances of NaNO₃ is :

1. 130.6

2. 111.4

3. 150.2

4. 105.2

Formula of copper pyrite is

1. CuFeS

2. Cu₂Fe₂S₂

3. Cu₂S

4. CuFeS₂

Which of the following complex species is not expected to exhibit optical isomerism?

1. [Co(en) (NH₃)₂Cl₂]⁺

2. [Co(en)₂Cl₂]

3. [Co(NH₃)₃Cl₃]

4. [Co(en)₃]³⁺

The overall rate of a reaction is governed by

1. the rate of slowest intermediate step

2. the average of the rates of all the intermediate steps

3. the rate of fastest intermediate step

4. the sum total of the rates of all intermediate steps

If the radius of an atom of an element is 75 pm and the lattice is body centred cubic, the edge of the unit cell will
be :

1. 173.2 pm

2. 32.475 pm

3. 37.5 pm

4. 212.1 pm

Arrange the following alcohols in order of increasing reactivity towards sodium metal.
(i) (CH₃)₃C-OH
(ii) (CH₃)₂CH-OH
(iii) CH₃CH₂OH

1. (ii) > (i) < (iii)

2. (iii) < (ii) < (i)

3. (iii) < (i) < (ii)

4. (i) < (ii) < (iii)

Which of the following reagents can not, be used to oxidise primary alcohols to aldehydes?

1. CrO₃ in anhydrous medium

2. KMnO₄ in acidic medium

3. Pyridinium chlorochromate

4. Heat in the presence of Cu at 573 K

Which of the following statements is not correct?

1. Some disinfectants can be used as antiseptic at low concentration

2. Chloramphenicol is a broad spectrum antibiotic

3. Aspirin is analgesic and anatipyretic

4. Norethindrone is an antihistamines

The specific conductivity of a saturated solution of AgCl is 3.40 × 10-6 ohm-1cm-1 at 25 ºC. If λ_Ag+ = 62.3 ohm-1cm2 mol-1 & λ_cl = 67.7 ohm-1cm2 mol-1, the solubility of AgCl at 25º C is :

1. 3.6 × 10-5 M

2. 2.6 × 10-5 M

3. 4.5 × 10-3 M

4. 3.6 × 10-3 M

Electronic configuration of alkaline earth element is

1. ns¹

2. np⁶

3. ns²

4. ns⁰

Correct formulae of tetraaminechloronitroplatinum (IV) sulphate can be written as

1. [PtCl(ONO)NH₃(SO₄)]

2. [Pt(NH₃)₄Cl₂NO₂]₂

3. [Pt(NH₃)₄ (NO₂) Cl]SO₄

4. [Pt(NH₃)₄ (ONO) Cl]SO₄

The unit of rate constant for the reaction 2H₂ + 2NO → 2H₂O + N₂which has rate = K|H₂||NO|², is

1. s^-1

2. mol L^-1

3. mol^-2 L² s^-1

4. mol L^-1 s^-1

A mixture has 18 g water and 414 g ethanol. The mole fraction of water in mixture is (assume ideal behaviour of the mixture) :

1. 0.7

2. 0.4

3. 0.9

4. 0.1

Invert sugar is

1. mixture of glucose and fructose in equimolar quantities

2. a type of cane sugar

3. optically inactive form of sugar

4. mixture of glucose and galactose

Arrange the following polymers is an increasing order of intermolecular forces: fibre, plastic, elastomer

1. Plastic < Elastomer < Fibre

2. Elastomer < Plastic < Fibre

3. Fibre < Elastomer < Plastic

4. Elastomer < Fibre < Plastic

Which of the following from isocyanide on reaction with CHCl and KOH?

1. C₆H₅N (C₂H₅)₂

2. C₆H₅NHCH₃

3. C₆H₅NHC₄H₉

4. CH₃C₆H₄NH₂

A reaction in which reactants (R) are converted into products (P) follows second order kinetics. If concentration of R is increased by four times, what will be the increase in the rate of formation of P?

1. 8 times

2. 9 times

3. 4 times

4. 16 times

The specific conductance of a 0.01 M solution of KCl is 0.0014 ohm-1 cm-1 at 25°C, Its equivalent conductance
(cm2 ohm-1 equiv-1 M) is :

1. 0.14

2. 14

3. 140

4. 1.4

Tyndall effect confirms the

1. gravity effect on the sol. particles

2. Brownian motion of the sol. particles

3. light scattering by the sol. particles

4. heterogeneous nature of sols.

Half life period of a first order reaction is 10 min. What percentage of the reaction will be completed in 100 min?

1. 25%

2. 75%

3. 50%

4. 99.9%

The oil used as frothing agent in froth floatation process is

1. palmitic oil

2. pine oil

3. castor oil

4. coconut oil

In which of the following allotropes of carbon, percentage of carbon is maximum?

1. Graphite

2. Coconut charcoal

3. Wood charcoal

4. None of these

Order of esterification of alcohols are

1. 2°> 3° > 1°

2. 3° > 1° > 2°

3. None of these

4. 1° > 2° > 3°

Propanone can be prepared from ethyne by

1. boiling ethyne with water in the presence of HgSO₄ and H₂SO₄

2. passing a mixture of ethyne and ethanol over a catalyst zinc chromite

3. treating ethyne with iodine and NaOH

4. passing a mixture of ethyne and steam over a catalyst, magnesium at 420°C

Which of the following ligands form a chelate?

1. Ammonia

2. Oxalate

3. Cyanide

4. Acetate

Which of the following compounds exhibits linkage isomerism?

1. [Co(NH₃)₅CI]Br₂

2. [Co(NH₃)₆] [Cr(en)₃]

3. [Co(en)₂(NO₂)CI]Br

4. [Co(en)₃]Cl₃

Reduction of CH₃CH₂NC with hydrogen in presence of Ni or Pt as catalyst gives

1. CH₃CH₂NH₂

2. CH₃CH₂NHCH₂CH₃

3. CH₃CH₂NHCH₃

4. (CH₃)₃N

Maltose is made up of

1. two α-D-glucose

2. normal β-D-glucose

3. fructose

4. α- and β-D-glucose

What happens when tertiary butyl alcohol is passed over heated copper at 300°C?

1. Butanol is formed

2. 2-methylpropene is formed

3. 1-butene is formed

4. Secondary butyl alcohol is formed

Identify the correct pathway to convert propanoic acid to ethylamine. The reagent represented by A, B and C are
MCQ Questions for Class 12 Chemistry Chapter 13 Amines with Answers 2

1. (b)

2. (a)

3. (d)

4. (c)

The specific conductance of a salt of 0.01 M concentration is 1.061 × 10-4 molar conductance of the same solution will be :

1. 1.061

2. 10.61

3. 106.1

4. 1.061 × 10-4

Which of the following amides will give ethylamine on reaction with sodium hypobromide ?

1. Propanamide

2. Butanamide

3. Benzamide

4. Acetamide

An unknown alcohol is treated with “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?

1. Secondary alcohol by S_N²

2. Tertiary alcohol by S_N²

3. Tertiary alcohol by S_N¹

4. Secondary alcohol by S_N¹

Zr and Hf have almost equal atomic and ionic radii because of

1. actinoid contraction

2. belonging to the same group

3. diagonal relationship

4. lanthanoid contraction

Barbituric acid and its derivatives are well known as

1. analgesics

2. tranquilizers

3. antiseptics

4. antipyretics

Which of the following will not show geometrical isomerism?

1. [Co(en)₂Cl₂]Cl

2. [Pt(NH₃)₂Cl₂]

3. [Cr(NH₃)₄Cl₂]Cl

4. [(Co(NH₃)₅NO₂]Cl₂

What is the test to differentiate between penta-2-one and pentan-3-one?

1. Aldol condensation test

2. Benedict’s test

3. Fehling’s test

4. Iodoform test

In the following reaction sequence Z is
MCQ Questions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers with Answers 6

1. butan-2-ol

2. 2-methylpropan-2-ol

3. butan-1-ol

4. 1, 1-dimethylethanol

Presence of traces of arsenious oxide (As₂O₃) in the reacting gases SO₂ and O₃in presence of plantinised asbestos in contact process acts as

1. catalytic promoter

2. catalytic poison

3. drying agent

4. dehydrating agent

Which of the following will not give aldol condensation?

1. 2-Methylpentanal

2. Benzaldehyde

3. 1-Phenylpropanone

4. Phenyl acetaldehyde

An ore of tin containing FeCrO₄ is concentrated by

1. magnetic separation

2. froth floatation

3. gravity separation

4. leaching

Which of the following compounds does not react with NaHSO₃?

1. C₆H₅COCH₃

2. CH₃COCH₃

3. HCHO

4. CH₃CHO

Good conductor of electricity and heat is

1. Diamond

2. Graphite

3. Charcoal

4. Anthracite coke

General formula of Alkene is

1. none of these

2. C_nH_2n-2

3. C_nH_2n+2

4. C_nH_2n

The most convenient method to prepare primary (i Amine) amine containing one carbon atom less is

1. Reduction of isonitriles

2. Reductive amination of aldehydes

3. Gabriel phthalimide synthesis

4. Hofmann bromamide reaction

Which of the following is a narcotic analgesic?

1. Morphine

2. Paracetamol

3. Ibuprofen

4. Aspirin

For which of the following ores froth floatation method is used for concentration?

1. Magnetite

2. Zinc blende

3. Camallite

4. Haematite

During acetylation of glucose it needs ,v moles of.acetic anhydride. The value of x would be

1. 4

2. 3

3. 5

4. 1

One mole of ethyl acetate on treatment with an excess of LiAlH₄ in dry ether and subsequent acidification produces

1. 1 mole acetic acid + 1 mole ethyl alcohol

2. 1 mole of 2-butanol

3. 1 mole ethyl alcohol + 1 mole methyl alcohol

4. 2 moles of ethyl alcohol

Which of the following will not act as a tranquilizer?

1. Meprobamate

2. Chlordiazepoxide

3. Equanil

4. Analgin

Bromination of methane in presence of sunlight is a

1. free radical substitution

2. nucleophilic addition

3. electrophilic substitution

4. nucleophilic substitution

Identify the correct IUPAC name

1. (CH₃)₃CNH₂ = 2-methylpropan-2-amine

2. (CH₃)₂CHNH₂ = 2, 2-Dimethyl-N-propanamine

3. (CH₃CH₂)₂NCH₃ = N-Ethyl-N-methylethanamine

4. CH₃NHCH (CH₃)₂ = N-Methylpropan-2-amine

Glycogen, a naturally occurring polymer stored in animals is a

1. trisaccharide

2. disaccharide

3. monosaccharide

4. polysaccharide

A drug which acts as antipyretic as analgesic is

1. chlordiazepoxide

2. penicillin

3. chloroquine

4. 4-acetamidophenol

In chemical equation H₂ (g) + I₂ (g) ⇌ 2HI (g) the equilibrium constant K_p depends on

1. total pressure

2. catalyst used

3. amount of H₂ and I₂

4. temperature

Azeotropic mixture are :

1. Those which can be fractionally distilled

2. Those which boil at different temperature

3. Constant boiling mixtures

4. Mixture of two solids

The value of λ∞_m for NH₄Cl, NaOH and NaCl are 129.8, 248.1 and 126.4 ohm-1 cm2 mol-1 respectively.
Calculate λ∞_m for NH₄OH solution (in ohm-1 cm2 mol-1)

1. 244.7

2. 251.5

3. 351.5

4. 215.5

Single bond length between carbon-carbon is

1. 1.34 Å

2. 1.20 Å

3. none of these

4. 1.54 Å

Which of the following reactions follows Markovnikov’s rule?

1. C₃H₆ + HBr

2. C₃H₆ + Br₂

3. C₂H₄ + HBr

4. C₃H₆ + Cl₆

Which of the following compounds will undergo Cannizzaro reaction?

1. C₆H₅CH₂CHO

2. CH₃CHO

3. CH₃COCH₃

4. C₆H₅CHO

A solid X+Y- has a bcc structure. If the distance of closest approach between the two atoms is 173 pm, the edge length of the cell is :

1. 200 pm

2. 142.2 pm

3. √2 pm

4. √3/√2 pm

An X molal solution of a compound in benzene has mole fraction of solute equal to 0.2. The value of X is :

1. 1.4

2. 14

3. 3.2

4. 2

The reaction of toluene with chlorine in presence of FeCl3 gives predominantly.

1. amixture of o-and p-chlorotoluene

2. benzyl chloride

3. benzoyl chloride

4. m-chlorotuluene

Criteria for purity of organic solid is

1. specific gravity

2. melting point

3. none of these

4. boiling point

Which of the following compounds has the highest boiling point?

1. CH₃CH(CH₃)CH₂Cl

2. (CH₃)₃CCl

3. CH₃CH₂CH₂CH₂Cl

4. CH₃CH₂CH₂Cl

The melting point of copper is higher than that of zinc because

1. the s as well as d electrons of copper are involved in metallic bonding

2. the atomic volume of copper is higher

3. the electrons of copper are involved in metallic bonding

4. copper has a bcc structure

Which one of the following is alyophilic colloid?

1. Fog

2. Milk

3. Blood

4. Gum

Which of the following does not undergo Cannizzarro’s reaction?

1. 2-Methylpropanal

2. 2, 2-Dimethylpropanal

3. Benzaldehyde

4. p-Methoxybenzaldehyde

Nitrogen atom of amino group is ……… hybridised.

1. sp

2. sp³

3. sp³d

4. sp²

Which of the following solutions of NaCl will have the highest specific condutance ?

1. 0.001 N

2. 0.1 N

3. 0.01 N

4. 1.0 N

Which of the following is not an amphoteric ion?

1. Al³⁺

2. Zn²⁺

3. Fe³⁺

4. Cr³⁺

Which among the following is most reactive to give nucleophilic addition?

1. BrCH₂CHO

2. ClCH₂CHO

3. FCH₂CHO

4. ICH₂CHO

For the square planar complex |M_abcd| where M is the central atom and a, b. c, d are monodentate ligands, the number of possible geometrical isomers are

1. 2

2. 3

3. 4

4. 1

What is the end product in the following sequence of reactions?
MCQ Questions for Class 12 Chemistry Chapter 13 Amines with Answers 4

1. Aniline

2. Phenol

3. Benzene

4. Benzenediazxonium chloride

The powdered ore is agitated with water or washed with running stream of water. The heavy ore particles and lighter impurities are separated. This method of concentration is known as

1. leaching

2. froth floatation process

3. metallurgy

4. gravity separation

The decreasing order of boiling point of the following alcohols is

1. 2-methylbutan-2-ol > pental-1-ol > 3-methylbutan-2-ol

2. 3-methylbuan-2-ol > 2-methylbutan-2-ol > pentan-1-ol

3. Pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol

4. 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol

Which of the following alcohols gives 2-butenc on dehydration byconc. H₂SO₄?

1. 2-methyl propene-2-ol

2. 2-methyl 1 -propanol

3. Butane-2-ol

4. Butane 1-ol

The decomposition of dimethyl ether is a fractional order reaction. The rate is given by rate =k(PCH₃OCH₃)^3/2. If the pressure is measured in bar and time in minutes, then what are the units of rate and rate constant?

1. bar min^-1, bar^1/2 min^-1

2. bar min^-1, bar^1/2 min^-1

3. bar min^-1, bar² min^-1

4. bar^1/2 min^-1, bar² min^-1

Identify reactant (X) in the given reaction sequence
MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids with Answers 2

1. CH₃MgCl

2. CH₃CH₂MgCl

3. MgCl₂

4. CH₃COCl +Mg

Which of the following will not act as antacid?

1. Magnesium hydroxide

2. Aluminium hydroxide

3. Sodium carbonate

4. Sodium hydrogencarbonate

The rate constant of a reaction changes when…

1. a catalyst is added

2. Temperature is changed

3. Pressure is changed

4. Concentration of reactants changed

The vapour pressure of an ideal solution having 0.2 mole non-volatile solute & 0.8 mole solvent is 60 mm. The
vapour pressure of pure solvent at this temperature will be :

1. 120 mm

2. 60 mm

3. 75 mm

4. 150 mm

Which of the following is a condensation polymer?

1. Neoprene

2. Teflon

3. Polyester

4. PVC

For a solution of two liquids A and B. it was proved that P = X_A(P_A0– P_B0) + P_B0. The solution is :

1. None of these

2. Semiideal

3. Non ideal

4. Ideal

Diamond belongs to the crystal system :

1. triclinic

2. hexagonal

3. cubic

4. tetragonal

In the following sequence of reaction, the final product (Z) is
MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids with Answers 4

1. propan-2-ol

2. propanone

3. ethanal

4. propan-2-ol

C₃H₈N cannot represent

1. 1° ammine

2. 2° ammine

3. quatemary ammonium salt

4. 3° ammine

Which of the following isomers will give white precipitate with BaCl₂ solution?

1. [CO(NH₃)₅Br]SO₄

2. [CO(NH₃)₄(SO₄)]

3. [CO(NH₃)₅SO₄]Br

4. [CO(NH₃)₄(SO₄)₂]Br

Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give

1. tertiary alcohols

2. carboxylic acids

3. secondary alcohols

4. primary alcohols

The final product (Y) in the following sequence of chemical reaction is

1. an aldehyde

2. An alkene

3. sodium salt of carboxylic acid

4. a carboxylic acid

Composition of Ziegler-Natta catalyst is

1. (Me)₃Al.TiCl₂

2. (Et)₃Al.PtCl₄

3. (Et)₃Al.TiCl₄

4. (Et₃)₃Al.TiCl₂

Which of the following is used as Hinsberg’s reagent?

1. C₆H₅NHCH₃

2. C₆H₅SO₂Cl

3. C₆H₅COCH₃

4. C₆H₅SO₃H

The chemical reaction, 2O₃ → 3O₂ proceeds as O₃ ⇌ O₂ + |O| (fast) |O| + O₃ → 2O₂ (slow) The rate law expression will be

1. Rate = k [O₃]² [O₂]^-1

2. Rate = k [O] [O₃]

3. Rate = k [O₃]²

4. Rate = k [O₂] [O]

|Pt(NH₃)₄| |CuCl₄| and |Cu(NH₃)₄||PtCl₄| are known as

1. polymerisation isomers

2. ionisation isomers

3. coordination isomers

4. linkage isomers

Amides may be converted into amines by a reaction named after

1. Hofmann Bromide

2. Perkin

3. Kekule

4. Claisen

K₂[Fe(CN)₆] is a/an

1. double salt

2. acid

3. complex salt

4. base

Amine that cannot be prepared by Gabricl-Phthalmidie synthesis is

1. methyl amine

2. benzyl amine

3. iso-butylamine

4. aniline

Your score is

Chapters Wise MCQs..

Chapter 1: Some Basic Concepts of Chemistry.
Chapter 2: Structure of Atoms.
Chapter 3: classification of Elements and Periodicity in Properties.
Chapter 4: Chemical Bonding and Molecular Structure.
Chapter 5: States of Matter.
Chapter 6: Thermodynamics.
Chapter 7: Equilibrium.
Chapter 8: Redox Reaction.
Chapter 9: Hydrogen.
Chapter 10: S-block Elements.
Chapter 11: P-block Elements.
Chapter 12: Organic Chemistry - Some Basic Principles and Techniques.
Chapter 13: Hydrocarbons.
Chapter 14: Environmental Chemistry.