AIIMS Chemistry Mock Test - 2


60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Chemistry Mock Test - 2


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Attempt AIIMS Chemistry Mock Test - 2 | 60 questions in 60 minutes | Mock test for NEET preparation | Free important questions MCQ to study AIIMS Mock Tests & Previous Year Papers for NEET Exam | Download free PDF with solutions
QUESTION: 1

Ethyl alcohol gives ethyl chloride with the help of

Solution:
QUESTION: 2

The homolytic fission of a hydrocarbon results in the formation of

Solution:

The correct option is B.
The homolytic fission of a hydrocarbon results in the formation of free radicals.

QUESTION: 3

Freon is used as a

Solution:
QUESTION: 4

Gammexane is

Solution:
QUESTION: 5

'M' is the molecular mass of 'KMnO₄'.The equivalent mass of KMnO₄ when it is converted into K₂MnO₄ is

Solution:
QUESTION: 6

The bond order of individual carbon carbon bonds in benzene is

Solution:
QUESTION: 7

Toluene on oxidation with chromyl chloride produces

Solution:

The correct answer is B as the oxidation of toluene (C6H5CH3​ with chromyl chloride (CRO2Cl2 in CCl4 or CS2 to give benzaldehyde is called Etard reaction. In this reaction, the chromyl chloride first forms a brown complex, which is separated and then decomposed with H2O to give benzaldehyde (C6H5CHO).

QUESTION: 8

Which of the following gas changes lime water in milky colour?

Solution:
QUESTION: 9

The pair of species having identical shapes for melecules of both species is

Solution: Correct option(b) XeF2,CO2
Explanation:
XeF2 contains sp3d hybridised Xe atom with three lone pairs of electrons. Fluorine atoms occupy axial positions while three lone pairs of electrons occupy equatorial positions in trigonal bipyramid. Since the lone pair of electrons does not consider for the shape of the molecule, thus, the shape of XeF2 comes out to be linear. While C -atom of CO2 is sp hybridised and thus, possesses a linear shape.
QUESTION: 10

A substance 'A' decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of A and flask II contains 100 ml of 0.6 M solution. After 8 hrs, the concentration of A in flask I becomes 0.25 M, what will be the time for concentration of A in flask II to become 0.3 M?

Solution:
QUESTION: 11

The time taken for 90% of a first order reaction to complete is approximately

Solution:
QUESTION: 12

When 1 mol of a gas is heated at constant volume, temperature is raised from 298 to 308 K. Heat supplied to gas is 500 J. Then which statement is correct?

Solution:

The correct answer is B as From first law of thermodynamics:
ΔU=q+W
In the given problem, q=500 J
W=−pΔV=0, ΔV=0
So, ΔU=q=500 J

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): HNO3 is a stronger acid than HNO2.
Reason(R): In HNO3 there are two nitrogen-to-oxygen double bonds whereas in HNO2 there is only one.

Solution:
QUESTION: 14

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): Carbonyl compounds react with phenyl hydrazine to form phenyl hydrazones.
Reason(R): Hydrozones of aldehydes and ketones are prepared in highly acidic medium.

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): H₂O₂ can reduce Cl₂ to HCl.
Reason(R): H₂O₂ is also called antichlor.

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): Melting point and b.p are taken as criteria of party of an organic compound.
Reason(R): Pure organic compounds have sharp constant m.p or b.p.

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): Lithium differes from rest of the members of group I.
Reason(R): Li has small size and forms covalent compounds in comparison to other group I metals.

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): Borax bead test is not suitable for Al(III).
Reason(R): Al₂O₃ is insoluble in water.

Solution:

Borax bead test is employed in qualitative analysis for the detection of certain coloured basic radicals such as Ni2+, Co2+, Cr3+, Cu2+, Mn2+, etc. While Al3+ being colourless does not form a coloured borax bead.

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): Electrolytic conduction increases with increase in temperature.
Reason(R): Increase in temperature causes the electronic movement more rapid.

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): NO3- is planar while NH3 is pyramidal.
Reason(R): N in NO3- is sp2 hybridised but in NH3 it is sp3 hybridised.

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): PCl5 is covalent in gaseous and liquid state but ionic in solid state.
Reason(R): The solid state of PCl5 consists of tetrahedral cation and octahedral anion.

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): Para-hydrogen has lower internal energy and is favoured at high temperature.
Reason(R): The thermal conductivity of para-hydrogen is lesser than that of ortho-hydrogen.

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): The kinetic of the reaction: mA + nB + pC → m'X + n'Y + p'Z, obeys the rate expressions as dX/dt = k [A]m [B] n
Reason(R): The rate of the reaction does not depend upon the concentration of C.

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(R): Lower aldehydes and ketones are soluble in water but the solubility decreases as the molecular masses increase.
Reason(R): Distinction between aldehydes and ketones can be made by Tollen's reagent.

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): Highly branched carboxylic acids are are acidic than unbranched acids.
Reason(R): Hydrogen bonding in carboxylic acid is stronger than alcohols.

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): The S-S-S bond angle in S8 molecule is 105º.
Reason(R): S8 has a V-shape.

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): Vitamin B5 is also called pyridoxin.
Reason(R): Deficiency of vitamin B5 causes determatitis and dementia.

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): [Ti(H2O)6]3+ is coloured while [Sc(H2O)6]3+ is colourless.
Reason(R): d-d transition is not possible in[Sc(H2O)6]3+.

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): Starch contains 20% amylose and 80% amyplopectin.
Reason(R): In starch , the glucose units are linked by β-linkages .

Solution:

The glucose units are linked to one another by α-glycosidic linkages in starch

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): Na+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+is less than that of Na+.
Reason(R): The magnitude of effective nuclear charge of the outer shell electrons in Al3+ is greater than that in Na+.

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.

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): Equimolar mixture HCl and ZnCl2 is known as Lucas reagent.
Reason(R): Lucas reagent can be used to distinguish between methanol and ethanol.

Solution:
QUESTION: 33

Reaction takes place at anode is

Solution:
QUESTION: 34

The e.m.f. of a cell prepared by combining Al/Al⁺3 and Ag/Ag⁺ is 2.46 V. The reduction potential of the silver electrode is +0.08 V. The reduction potential of the aluminum electrode is

Solution: -1.66......since aluminium displaces H+ from HCl and age doesn`t.... Hence Al is a reducing agent then,E•cell =E•cathode-E•anode.........................,............................... . where cathode is silver metal ,,, and anode is aluminium, because reducing agent(Al) is always can anode in galvanic cell........... Then 2.46=0.8-xx=0.8-2.46=... -1.66
QUESTION: 35

At what temperature, the volume of a gas at 0ºC will become double, when pressure remains constant?

Solution:
QUESTION: 36

The gas evolved on heating Na₂CO₃ is

Solution:
QUESTION: 37

Causticisation process is used for the preparation of

Solution:
QUESTION: 38

A combustile gas is liberated when caustic soda solution is heated with

Solution:
QUESTION: 39

Conc. HNO₃ reacts with iodine to give

Solution: I2 + conc. 10HNO3 ---> 2HIO3 + 10NO2 +4H2O
so the correct option is C. HOIO2
QUESTION: 40

Which one of the following statements is correct for alkaline earth metals?

Solution:
QUESTION: 41

Which of the following is correct about heavy water?

Solution:
QUESTION: 42

If H⁺ ion conc. of a solution is increased by 10 times, its pH will

Solution: We know,pH=-log[H^+] pH=-log[10]. pH=-1... i.e.,c)pH decreases by 1..
QUESTION: 43

Which one of the following can be considered as weak electrolyte ?

Solution:
QUESTION: 44

An example of a salt that will not hydrolyse is

Solution:
QUESTION: 45

An acidic buffer can be prepared by making solution of

Solution:
QUESTION: 46

Acetone is prepared by

Solution: (CH3COO)2 Ca when you heat it that means pyrolysis ....CaC03 comes out and u get acetone as the product further CaC03 decomposes to form Ca0 and C02.
QUESTION: 47

Which of the following statements regarding chemical properties of acetophenone are wrong?
I.It is reduced to methylphenylcarbinol by sodium and ethanol
II. It is oxidised to benzoic acid with acidified KMnO₄
III. It does not undergo electrophilic substitution like nitration at meta position
IV. It does not undergo iodoform reaction with iodine and alkali

Solution:
QUESTION: 48

Select incorrect statements(s):

Solution:
QUESTION: 49

Following carbocation changes to more stable carbocation :

Solution:
QUESTION: 50

E2 reaction is called:

Solution:
QUESTION: 51

Select correct statement(s)for the following reaction :

Solution:
QUESTION: 52

Ultra-silicon is prepared by the process of

Solution:
QUESTION: 53

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

Solution:
QUESTION: 54

Addition of arsenic to germanium makes the latter a

Solution:
QUESTION: 55

A solution is obtained by dissolving 12 g of urea (mol.wt. 60) in one litre of water. Another solution is obtained by dissolving 68.4 g of cane sugar (mol.wt. 342) in one litre of water at same temperature. The lowering of vapour pressure in first solution is

Solution: Option A is correct we known that in the first solution number of the moles of urea. mass of urea 1 = -------------------------- × --------- m.wt. of urea V 12 1 = ------------------- × ----------- = 0.2 60 1 In second solution the number of moles of cane sugar. mass of cane sugar = -------------------------------------- m. wt. of cane sugar 68.4 1 = ------------- × ------- = 0.2 342 1
QUESTION: 56

The weight of pure NaOH required to prepare 250 cm3of 0.1 N solution is

Solution:
QUESTION: 57

An aqueous solution of glucose is 10% in strength. The volume in which 1 gm mole of it is dissolved will be

Solution:
QUESTION: 58

Which out of the following is chiral in nature?

Solution:
QUESTION: 59

How many litres of CO₂ at STP will be formed when 100 ml of 0.1 M H₂SO₄ reats with excess of Na₂CO₃ ?

Solution:
QUESTION: 60

Cuprous ore among the following is

Solution:
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