+1 Chemistry

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Class 11 FULL Chemistry

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Gas ⟶ liquid, conversion is possible at

What is the indicator of pollution in water?

Most crystal show good cleavage because their atoms, ions or molecules are

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

When electric current is passed through an ionic hydride in the molten state

The acidified solution of FeCl3 is reduced by passing:

The false statement among the followings:

The substance which is a primary pollutant?

H2O2 is formed by which of the following compounds?

Which of the following compounds will exhibit geometrical isomerism?

2 – Phenylpropene on acidic hydration gives

In the case of alkali metals, the covalent character decreases in the order

Temporary hardness may be removed from water by adding

Which is most harmful for life on globe?

For the given reaction 2A(s) + B(g) ⇌ C (g) + 2D (s) + E (s) the degree of dissociation of B was found to be 20% at
300K and 24% at 500K . The rate of forward

For which change ∆H ≠ ∆E -

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

Which of the halogen has maximum affinity for hydrogen?

Which of the following mainly forms metal oxide on heating in air?

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

An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be

When same amount of zinc is treated separated with excess of sulphuric acid and excess of sodium hydroxide
solution the ratio of volume of hydrogen evolved is

Which overlapping in involved in HCl molecule:

Solubility of the alkaline earth’s metal sulphates in water decreases in the sequence

A system has internal energy equal to E1, 450 J of
heat is taken out of it and 600 J of work is done on it.
The final energy of the system will be -

Electrolysis of 𝑋 gives 𝑌 at anode. Vacuum distillation of 𝑌 gives H2O2. The number of peroxy (O - O) bonds present in 𝑋 and 𝑌 respectively are

Oxidation number of As atoms in
H3AsO4 is

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

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

When CuSO4 reacts with KI, the oxidation number of Cu
changes by

Which of the following element was absent in the Mendeleev's periodic table :-

𝛑-bond is formed:

Atomic wt. of P is 31 and Sb is 120. What will be the atomic wt. of As, as per Dobereiners triad rule :-

Which is not present in clear hard water?

Which of the following is paramagnetic?

The number of electrons in one molecule of CO2 are

Which substance cannot be reduced by H2O2?

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

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 ?

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

The ortho and para hydrogen possess:

The first and second dissociation constants of an acid H2A are 1.0 × 10-5 and 5.0 × 10-10 respectively. The overall
dissociation constant of the acid will be

Ortho-hydrogen and para-hydrogen resembles in which of the following property

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

Hydrogen acts as a reducing agent and thus resembles

Which of the following is isoelectronic with N2O

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

_______ of a crystal is reflected in the magnitude of its melting point.

Sodium atom differs from sodium ion in the number of

Photochemical smog is related to pollution if

Which of the following statement is correct for diborane ?

Which salt of heating does not give brown coloured gas?

Mass of 1 atom of Hydrogen is -

TiH1.73 is an example of ∶

The strength of bonds by 2s – 2s, 2p – 2p and 2p – 2s overlapping has the order:

Which of the following statement is wrong :-

Which one of the following removes temporary hardness of water?

Carbon has zero oxidation number in

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

Similarity of fluorine and oxygen may not be attributed to

Mesomeric effect involves the delocalisation of :

Mercury has relatively high

RbO2 is

Rutherford’s α - particle scattering experiments led to the conclusion that

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

Oil paintings turn blackish after sometimes. The salt formed is

From the B2H2 all the following can be prepared except :

Oxidation number of S in S2Cl2 is

The mass of an atom is constituted mainly by

The percentage of para hydrogen in ordinary hydrogen increases when:

The volume of oxygen liberated from 15 mL of 20 volume H2O2 is

In a period the elements are arranged in :–

Mendeleev's periodic table is based on :-

The nitrogen atom has 7 protons and 7 electrons, the nitride ion (N3-) will have

Both q & w are ......... Function & q + w is a .....
function -

Which position for hydrogen explain all its properties?

p – p overlapping will be observed in the molecules of:

Hyperconjugation effect involves :

Diborane reacts with water to form :

Which of the following has least mass?

The angle strain in cyclobutane is

How many moles of Helium gas occupy 22.4 L at 0°C at 1 atm. pressure?

The law of triads is applicable to :-

IUPAC name of the element placed just after actinide series :-

Which of the following statement is false :-

Identify the element which can have
highest oxidation numbers

Sequence of ionic mobility in aqueous solution is

Among the Lanthanides the one obtained by synthetic method is :–

On shaking H2O2 with acidified potassium dichromate and ether, ethereal layer becomes

For a gaseous reaction,
A(g) + 3B(g) ➜ 3C(g) + 3D(g)
∆E is 17 Kcal at 27°C assuming R = 2 cal K-1
the value of ∆H for the above reaction is -

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

Select the incorrect statement.

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

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

Which one of these is not true for benzene?

Which of the following is not correct regarding the electrolytic preparation of H2O2?

Resonance structures of a molecule do not have :

The gas A2 in the left flask allowed to react with gas B2 present in right flask as

A2 (g) + B2 (g) ⇌ 2AB (g) ; Kc = 4 at 27℃

What is the concentration of AB when Equilibrium is established ?

The oxidation state shown by silicon
when it combines with strongly electropositive
metals is

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

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Class 12 FULL Chemistry

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This reaction is an example of
MCQ Questions for Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes with Answers 1

According to Werner’s theory of coordination compounds

Which of the following polymers does not involve cross-linkages?

Which of the following is not an example of addition polymer?

Carbohydrates are stored in human body as the polysaccharide

Which of the following, is an example of a fractional order reaction?

Which of the following solution containing components A and B follows Raoult’s law :

Fe3+ ion is more stable than Fe2+ ion because

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

α-Hydroxypropanoic acid can be preapred from ethanal by following the steps given in the sequence

What happens when potassium iodide reacts with acidic solution of potassium dichromate?

Which of the following compounds exhibits linkage isomerism?

Acid catalysed dehydration of t-butanol is faster than that of n-butanol because

The equivalent conductance of 32 M solution of a weak monobasic acid is 8.0 mho cm2 and at infinite dilution
is 400 mho cm2. The dissociation constant of this acid is :

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

The general formula of carbohydrates is

Which of the following metals is extracted using a silica lined convertor?

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

For a reaction pA + qB→ Products. Rate = K[A]m [B]n. Then

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

Lanthanoid contraction is due to increase in

Which of the following will not show geometrical isomerism?

A drug which acts as antipyretic as analgesic is

The rate constant of a reaction changes when…

An alloy of copper, silver and gold is found to have copper consituting the ccp lattice. If silver atoms occupy the
edge centres and gold present at body centre, the alloy has a formula :

The hybridisation of carbon in diamond is

Which of the following can be used as an analgesic without causing addiction?

The vapour pressure of two pure liquids “A” and “B” are 100 and 80 torr respectively. The total pressure of the
solution obtained by mixing 2 mol of “A” and 3 mol of “B” would be :

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

Which of the following is not an element of first transition series?

Which one of the following is diamagnetic ion?

Nitrogen atom of amino group is ……… hybridised.

The chemical substances used to bring down body temperature in high fever are known as

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

Malachite is an ore of

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?

The equivalent conductivity of 0.1 N CH3COOH at 25°C is 80 and at infinite dilution 400. The degree of dissociation of CH3COOH is :

Which of the following compounds does not react with NaHSO3?

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

Concentration of sulphide ore is done by

Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask?

For a unimolecular reaction

Which of the following reactions will give benzolphenone?
(i) Benzoyl chloride + Benzene + AlCl3
(ii) Benzoyl chloride + Phenylmagnesium bromide
(iii) Benzoyl chloride + Diphenyl cadmium

General formula of Alkene is

Which of the following is an example of an aldopentose?

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

Alkene gives which of the following reactions?

The best oxidising agent- for oxidation of
CH3-CH = CH-CHO to CH3-CH = CH-COOH is

Most abundant element in earth’s crust is

Identify the type of polymer
(i) -A-A-A-A-A-A-
(ii) -A-B-B-A-A-A-B-A-

Maltose is made up of

Organic compound must contain an element

The oxidation state of nickel in |(Ni(CO4)| is

Tetraagonal crystal system has the following unit cell dimensions :

How many rectangular faces are in an orthorhombic unit cell ? (Given : a ≠ b ≠ c and α = β = γ = 90o)

Natural rubber is a polymer of

Azeotropic mixture are :

Which of the following is not a neutral ligand?

Valency of carbon is

Which of the following alcohols will give the most stable carbocation during dehydration?

In the reaction N2O4(g)→2NO2(g) the pressure of N2O4 falls from 0.5 atm to 0.32 atm is 30 minutes, the rate of appearance of NO2(g) is

Formula of copper pyrite is

Dacron is an example of

The correct IUPAC name of the coordination compound K3|Fe(CN)5NO| is

Diamond belongs to the crystal system :

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

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

If the radius of metal atom is 1.00 Å and its crystal structure is simple cubic, then what is the volume of one unit
cell ?

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 end product Z of the reaction
MCQ Questions for Class 12 Chemistry Chapter 13 Amines with Answers 6

Which of the following is a condensation polymer?

Hybridisation of carbon in ethane is

What is the mole ratio of benzene (PB0= 150 torr) and toluene (PT0= 50 torr) in vapour phase if the given solution has a vapour pressure of 120 torr?

Phenol when treated with excess of bromine water gives a white precipitate of

Which of the following can adsorb larger volume of hydrogen gas?

Sulphide ore of zinc/copper is concentrated by

In a reaction, 2X → Y, the concentration of X decreases from 0.50 M to 0.38 M in 10 min. What is the rate of reaction in Ms-1 during this interval ?

A compound formed by elements A and B crystallises in the cubic structure, where A atoms are present at the
corners of a cube and B atoms are present at the face centres. The formula of the compound is :

An ore of tin containing FeCrO4 is concentrated by

Which of the following statements is not correct about penicillin?

Study the given reaction and identify the process which is carried out
MCQ Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids with Answers 3

_____does not affect the rate of reaction.

8 g NaOH is dissolved in one litre of solution, its molarity is :

Secondary amines can be prepared by

The vapour pressure of a pure liquid ‘A’ is 70 torr at 27°C. It forms an ideal solution with another liquid 'B'. The
mole fraction of 'B' is 0.2 and total vapour pressure of the solution is 84 torr at 27°C. The vapour pressure of pure
liquid 'B' at 27°C is :

A compound X with the molecular formula C2H8O can be oxidised to another compound Y whose molecular formulae is C3H6O2. The compound X may be

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

Which of the following shows maximum number of isomers?

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

Heating rubber with sulphur is known as

Which of the following reagents are not correctly matched with the reaction?

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

The S in buna-S refers to

What are the hydrolysis products of sucrose?

Electronic configuration of alkaline earth element is

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

Primary and secondary amines are distinguished by

Shape of d-orbital is

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