+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 :–

A crystalline solid

Which of the following has incorrect direction of Inductive effect.

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

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

Thermal stability of alkaline earth metal carbonates in decreasing order is

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

Which salt of heating does not give brown coloured gas?

The percentage of para hydrogen in ordinary hydrogen increases when:

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

Which of the following is always a whole number

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

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

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

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

Thermal stability of hydrides of first group elements follows the order

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

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

The acidified solution of FeCl3 is reduced by passing:

The major binding force of diamond is

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

Mesomeric effect involves the delocalisation of :

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

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

Which of the following is an amphoteric hydroxide?

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

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

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

Oxidation state of Fe in Fe3O4 is

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

Which of the following reactions produces hydrogen?

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

Which is not characteristic of 𝛑-bond:

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

Which pair does not show hydrogen isotopes?

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 :-

Which overlapping in involved in HCl molecule:

Similarity of fluorine and oxygen may not be attributed to

Which of the following is not true?

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

The H − O − O bond angle in H2O2 is

Which statement is correct regarding Inductive effect ?

Which of the following will weigh maximum amount-

Oxidation number of Mn in K2MnO4 and MnSO4
are respectively

The atomic number of an element represents

The angle strain in cyclobutane is

The boiling points of the following hydrides follow the order

Presence of a nitro group in a benzene ring

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

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

What is the oxidation number of sulphur in Na2S4O6

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

Which of the following is a molecular crystal ?

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

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

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

Which substance cannot be reduced by H2O2?

Which position for hydrogen explain all its properties?

H2 acts as an oxidant in its reaction with:

Isopropyl bromide on Wurtz reaction gives

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

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

Which of the following oxides is amphoteric?

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

An atom which has lost one electron would be

Which of the following gives CO2 on heating?

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

The first fraction obtained during the fractionation of petroleum is:

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

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

Which of the following acts as a sink for CO?

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

The number of electrons in one molecule of CO2 are

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

Which of the following is strongest base?

Which of the following statement is false :-

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

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 ?

Inductive effect involves :

The oxidation state of Cr in Cr2O72- is

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

In which reaction there is a change in valency

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)

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

In a period the elements are arranged in :–

What is the indicator of pollution in water?

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

Identify the wrong statement in the following:

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

𝛑-bond is formed:

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

Oxidation number of S in S2Cl2 is

Which of the following compounds will exhibit geometrical isomerism?

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

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

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

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

Which of the following statement is wrong :-

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

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Class 12 FULL Chemistry

These MCQs are intended for checking your ChemistryAll Chapters  knowledge!!

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

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

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

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 :

Formula of copper pyrite is

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

The overall rate of a reaction is governed by

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 :

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

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

Which of the following statements is not correct?

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

Electronic configuration of alkaline earth element is

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

The unit of rate constant for the reaction 2H2 + 2NO → 2H2O + N2 which has rate = K|H2||NO|², is

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

Invert sugar is

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

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

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?

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 :

Tyndall effect confirms the

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

The oil used as frothing agent in froth floatation process is

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

Order of esterification of alcohols are

Propanone can be prepared from ethyne by

Which of the following ligands form a chelate?

Which of the following compounds exhibits linkage isomerism?

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

Maltose is made up of

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

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

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

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

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?

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

Barbituric acid and its derivatives are well known as

Which of the following will not show geometrical isomerism?

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

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

Which of the following will not give aldol condensation?

An ore of tin containing FeCrO4 is concentrated by

Which of the following compounds does not react with NaHSO3?

Good conductor of electricity and heat is

General formula of Alkene is

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

Which of the following is a narcotic analgesic?

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

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

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

Which of the following will not act as a tranquilizer?

Bromination of methane in presence of sunlight is a

Identify the correct IUPAC name

Glycogen, a naturally occurring polymer stored in animals is a

A drug which acts as antipyretic as analgesic is

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

Azeotropic mixture are :

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

Single bond length between carbon-carbon is

Which of the following reactions follows Markovnikov’s rule?

Which of the following compounds will undergo Cannizzaro reaction?

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 :

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

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

Criteria for purity of organic solid is

Which of the following compounds has the highest boiling point?

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

Which one of the following is alyophilic colloid?

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

Nitrogen atom of amino group is ……… hybridised.

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

Which of the following is not an amphoteric ion?

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

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

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

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

The decreasing order of boiling point of the following alcohols is

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

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?

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

Which of the following will not act as antacid?

The rate constant of a reaction changes when…

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 :

Which of the following is a condensation polymer?

For a solution of two liquids A and B. it was proved that P = XA(PA0– PB0) + PB0. The solution is :

Diamond belongs to the crystal system :

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

C3H8N cannot represent

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

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

The final product (Y) in the following sequence of chemical reaction is
MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids with Answers 5

Composition of Ziegler-Natta catalyst is

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

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

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

Amides may be converted into amines by a reaction named after

K2[Fe(CN)6] is a/an

Amine that cannot be prepared by Gabricl-Phthalmidie synthesis is

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