AIIMS Chemistry Mock Test - 7 | 60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers NEET

QUESTION: 1

Zerewitnoff's determination of active hydrogen in a compound is based upon its reaction with

A.
Na
B.
CH₃MgI
C.
Zn
D.
Al

Solution:

QUESTION: 2

Avogadro's number is

A.
number of atoms in one gram of the element
B.
number of milli litres which one mole of a gaseous substance occupies at S.T.P.
C.
number of molecules present in one gram molecular mass of a substance
D.
All are correct

Solution:

QUESTION: 3

Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of

A.
conservation of mass
B.
constant composition
C.
multiple proportions
D.
constant volume

Solution:

QUESTION: 4

The bond between two identical non metal atoms has a pair of electrons

A.
unequally shared between the two
B.
transferred fully from one atom to another
C.
with identical spin
D.
equally shared between them

Solution:

QUESTION: 5

Aromatic compounds undergo

A.
Nucleophilic addition reaction
B.
Electrophilic addition
C.
Electrophilic substitution
D.
None of these

Solution:

QUESTION: 6

The correct order of reactivity towards the electrophilic substitution of the compounds ,aniline (I),benzene (II) and nitrobenzene (III),is

A.
II > III > I
B.
I < II > III
C.
I > II > III
D.
III > II > I

Solution:

QUESTION: 7

Water gas is a mixture of

A.
CO and H₂
B.
CO₂ and H₂O
C.
CO and N₂
D.
CO, H₂ and N₂

Solution:

QUESTION: 8

Gammexane is

A.
D.D.T.
B.
Benzene hexachloride
C.
Chloral
D.
Hexachloroethane

Solution:

QUESTION: 9

Freon is used as a

A.
catalyst
B.
oxidation
C.
refrigerants
D.
both 2 and 3

Solution:

QUESTION: 10

The dimension of rate constant of a second order reaction involves

A.
Neither time nor concentration
B.
Only time
C.
Time and concentration
D.
Time and square of concentration

Solution:

QUESTION: 11

The entropy change when two moles of ideal monoatomic gas is heated from 200^o C to 300^o C reversibly and isochorically ?

A.
B.
C.
D.

Solution:

QUESTION: 12

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The m.p./b.p. of noble gas are quite high.
Reason(R): The interparticle forces among noble gases in their liquid state are van der Waal's forces.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 13

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Li⁺ ion has the lowest mobility in aqueous solutions among alkali metals.
Reason(R): Lithium has higher ionisation energy among alkali metals.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 14

The reaction A → B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 hour. What is the time taken for conversion of 0.9 mole of A to produce 0.675 moles of B?

A.
1 hour
B.
0.5 hour
C.
0.25 hour
D.
2 hours

Solution:

QUESTION: 15

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The reaction rate of most of the reactions doubles when temperature is increased from 298 K to 308 K.
Reason(R): The activation energy of reaction decreases with increase in temperature.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 16

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The oxidation state of iron in brown coloured complex formed in ring test is +1.
Reason(R): The measured magnetic moment is 3.87 BM.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 17

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Second ionisation energy of C,N,O,F, increases in the order. C < N < F < O.
Reason (R): Ionisation energy increase with deceasing size.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is true but Reason is false.

Solution:

QUESTION: 18

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Iodination of alkane is made in presence of HgO or HIO₃.
Reason(R): Iodination is very slow and reversible process.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

The reaction of I₂ with alkanes is reversible because the HI formed as a by-product is a moderate reducing agent and hence reduces the iodoalkane back to alkane.

Thus, the iodination can be carried out in presence of an oxidising agent such as iodic acid (HIO₃) or HgO which converts HI to I₂ as it is formed:

QUESTION: 19

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): [Ni(CN)₄]^2- has square planar and [NiCl₄]^2- has tetrahedral shape.
Reason(R): [Ni(CN)₄]^2- is diamagnetic while NiCl₂^2- is paramagnetic.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 20

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Equanil is a tranquiliser.
Reason(R): Equanil is used to cure depression and hypertension.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 21

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Boric acid acts as a strong acid in presence of catechol.
Reason(R): Boric acid does not act as a proton donor but behaves as a Lewis acid.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 22

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Ice is less dense than water.
Reason(R): Ice is a solid whereas water is liquid.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 23

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Electrons enter into fifth shell even before the fourth shell is completely filled.
Reason(R): The subshell with lower value of (n + 1) possesses higher energy.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 24

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): According to the principle of common ion effect, the solubility of HgI₂ is expected to be less in an aqueous solution of KI than in water. But HgI₂ dissolves in an aqueous solution of KI to form a clear solution.
Reason(R): Iodide ion, I⁻, is highly polarisable.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 25

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The probability of finding 4s-electron very close to nucleus is not zero.
Reason(R): 4s electron density can penetrate into the inner shell electron density.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 26

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Non-metals oxidation state of metal
Reason(R): Oxidation state of metal becomes positive as it is oxidised and non-metal becomes negative asitis reduced.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is true but Reason is false.

Solution:

QUESTION: 27

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Elastomers are polymers that will not stretch when a force is applied on them.
Reason(R): Rubber is an elastomer.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 28

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Electronegativity of alkalinmi metal is low.
Reason(R): Ionisation energy and electron gain ehthalpy of alkali metal is low.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is true but Reason is false.

Solution:

QUESTION: 29

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In CaCl crystal, the co-ordination number of Cs⁺ ion is 8.
Reason(R): Ci^-ion in CsCl adopt bcc type of packing.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 30

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The rest mass for electron is 0.0005486 u.
Reason (R): Electron is assumed moving while calculating rest mass.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 31

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): CH₃ is an antiseptic agent.
Reason(R): CH₃ is volatilisable.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 32

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): [Pt(NH₂)₂Cl₂] is tetrahedral.
Reason(R): The oxidation state of platinum is +2.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 33

The standard reduction potentials of Ag, Cu, Co and Zn are 0.799, 0.337, -0.277 and -0.762 V respectively. Which of the following cells will have maximum cell EMF?

A.
B.
C.
D.

Solution:

QUESTION: 34

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10 Ω when a potential difference of 20 V is applied

A.
120 C
B.
240 C
C.
20 C
D.
4 C

Solution:

QUESTION: 35

Gases show ideal behaviour at

A.
High pressure and high temperature
B.
Low pressure and high temperature
C.
Low pressure and low temperature
D.
High pressure and low temperature

Solution:

QUESTION: 36

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

A.
Li
B.
Na
C.
K
D.
Rb

Solution:

QUESTION: 37

Main process for the manufacture of Na₃CO₃ is

A.
Castner process
B.
Solvay process
C.
Down process
D.
Nelson process

Solution:

QUESTION: 38

Which of the following imparts violet colouration to the Bunsen burner nonluminous flame?

A.
NaCl
B.
BaCl₂
C.
CaCl₂
D.
KCl

Solution:

QUESTION: 39

The halogen which is most easily reduced is

A.
F₂
B.
Cl₂
C.
Br₂
D.
I₂

Solution:

QUESTION: 40

The effective compound of bleaching powder is

A.
OCl₂²⁻
B.
OCl⁻
C.
O₂Cl²⁻
D.
O²⁻

Solution:

QUESTION: 41

Heavy water is used as

A.
Washing water
B.
Detergent
C.
Drinking water
D.
A moderator

Solution:

QUESTION: 42

Which has the highest pH ?

A.
CH₃COOK
B.
NaCO₃
C.
NH₄Cl
D.
NaNO₃

Solution:

QUESTION: 43

Hydrogen ion concentration of 0.2 M CH₃COOH, which is 40% dissociated, is

A.
0.4 M
B.
0.8 M
C.
0.12 M
D.
0.08 M

Solution:

QUESTION: 44

Which of the following sulphides has the lowest solubility product?

A.
FeS
B.
MnS
C.
PbS
D.
ZnS

Solution:

QUESTION: 45

The conjugate base of H₂PO₄⁻ is

A.
PO₄³⁻
B.
HPO₄²⁻
C.
H₃PO₄
D.
P₂O₅

Solution:

QUESTION: 46

The IUPAC name of acetone is

A.
Ethanal
B.
Propanone
C.
Butanone
D.
Propanal

Solution:

QUESTION: 47

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction. What will be the final product when cyclohex-2-enone is selectively reduced in MPV reaction ?

A.
Cyclohexanol
B.
Cyclohex-2-enol
C.
Cyclohexanone
D.
Benzene

Solution:

QUESTION: 48

Which group decreases acidic nature of phenol?

A.
―CH₃
B.
―NO₂
C.
D.

Solution:

QUESTION: 49

In the following conjugated system
CH₃CH═CHCH═CHCH₃ addition is considered at the :

A.
sp² -hybridised carbon
B.
sp³ -hybridised carbon
C.
sp -hybridised carbon
D.
sp² or sp³ hybridised carbon

Solution:

QUESTION: 50

Select incorect statement(s):

A.
S_N1 reaction also take place with some elimination
B.
S_N2 reaction with chiral compounds give racemic mixture
C.
S_N1 reaction is faster in more polar solvents
D.
All are incorrect statements

Solution:

QUESTION: 51

Indicate the alkyl halides out of the following which can undergo S_N1 reaction :

A.
I,II
B.
II,III
C.
I,III
D.
II,IV

Solution:

QUESTION: 52

Carborundum is formed by the reaction of

A.
SiO₂ + C
B.
Si + Mg
C.
Si + Ca
D.
Si + Na₂CO₃

Solution:

QUESTION: 53

Which of the following glass is used in making wind screen of automobiles?

A.
jena
B.
pyrex
C.
safety
D.
crook's

Solution:

QUESTION: 54

The edge length of the unit cell of body-centred lattice is 500 pm. If the radius of cation is 169 pm, then what is radius of anion?

A.
200 pm
B.
220 pm
C.
248 pm
D.
264 pm

Solution:

QUESTION: 55

For a dilute solution, Raoult's law states that

A.
The lowering of vapour pressure is equal to the mole fraction of the solute
B.
The relative lowering of vapour pressure is equal to the mole fraction of the solute
C.
The relative lowering of vapour pressure is proportional to the amount of solute in solution
D.
The vapour pressure of the solution is equal to the mole fraction of the solvent

Solution:

QUESTION: 56

Identify the mixture that shows positive deviations from Raoult's law

A.
CHCl₃+(CH₃)₂CO
B.
(CH₃)₂CO+C₆H₅NH₂
C.
CHCl₃+C₆H₆
D.
(CH₃)₂CO+CS₂

Solution:

QUESTION: 57

5 ml of N HCl, 20 ml of N/2 H₂SO₄ and 30 ml N/3 HNO₃ are mixed together, the volume made to one litre. The normality of the resulting solution is

A.
N/5
B.
5N/11
C.
N/11
D.
N/40

Solution:

QUESTION: 58

In a balanced equation

the values of x,y and z are

A.
x = 3,y = 5,z = 2
B.
x = 4,y = 8,z = 5
C.
x = 8,y = 4,z = 4
D.
x = 5,y = 3,z = 4

Solution:

QUESTION: 59

How many 'd' electrons are present in Cr²⁺ ion ?

A.
4
B.
5
C.
6
D.
3

Solution:

QUESTION: 60

Which product (s) would form in the following reaction?

A.
B.
C.
both (A) and (B).
D.
neither of the above

Solution:

AIIMS Chemistry Mock Test - 7

60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Chemistry Mock Test - 7

Zerewitnoff's determination of active hydrogen in a compound is based upon its reaction with

Avogadro's number is

Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of

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