JIPMER Chemistry Mock Test - 3

Question 1

The structural formula of 2-methyl 2-butene is .......

Accepted Answer

CH₃ - CH = C (CH₃) - CH₃

Answer

CH₃ - CH(CH₃) - CH = CH₂

Answer

CH₃ - CH₂ - C (CH₃) = CH₂

Answer

CH₃ - CH = CH - CH₃

Question 2

Ethyl bromide on treatment with alocoholic KOH gives

Accepted Answer

Ethylene

Answer

Ethanol

Answer

Acetic acid

Answer

Ethane

Question 3

Acetylene gives

Accepted Answer

White ppt. with ammonical AgNO₃ and red ppt. with ammonical Cu₂Cl₂

Answer

White ppt. with ammonical AgNO₃ and red ppt. with ammonical Cu(NO₃)₂

Answer

White ppt. with both

Answer

Red ppt. with both

Question 4

The homologue of ethyne is

Accepted Answer

C3H4

Answer

C2H6

Answer

C3H8

Answer

None of these

Question 5

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at

Accepted Answer

(5R/36)cm^-1

Answer

(3R/4)cm^-1

Answer

(7R/144)cm^-1

Answer

(9R/400)cm^-1

Question 6

The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of the element

Accepted Answer

17

Answer

6

Answer

11

Answer

23

Question 7

Which one of the following is not an isoelectronic pair

Accepted Answer

N-2, O-2

Answer

Mg⁺², C^-4

Answer

N-3, O-2

Answer

F^-, Al⁺³

Question 8

A one litre flask is full of brown bromine fumes. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some

Accepted Answer

Pieces of marble

Answer

Animal charcoal powder

Answer

CCl&#8324;

Answer

CS&#8322;

Question 9

Which is most ionic?

Accepted Answer

MnO

Answer

P&#8322;O&#8325;

Answer

CrO&#8323;

Answer

Mn&#8322;O&#8327;

Question 10

The hybrid state of I in IF₅ is

Accepted Answer

sp3d

Answer

sp3d2

Answer

sp3d3

Answer

sp3

Question 11

For a given reaction t_1/2 = (1/ka). The order of reaction is

Accepted Answer

2

Answer

1

Answer

0

Answer

3

Question 12

The law formulated by Nernst is

Accepted Answer

third law of thermodynamics

Answer

first law of thermodynamics

Answer

second law of thermodynamics

Answer

both a and b

Question 13

In a reversible reaction, the catalyst

Accepted Answer

decreases activation energy of both forward and backward reactions

Answer

increases activation energy of forward reaction

Answer

decreases activation energy of forward reaction

Answer

increases activation energy of backward reaction

Question 14

The compound with carbon uses only its sp³ hybrid orbitals for bond formation is

Accepted Answer

(CH₃)₃COH

Answer

HCOOH

Answer

(NH₂)₂CO

Answer

CH3CHO

Question 15

The bond dissociation energies of H₂,Cl₂ and HCl are 104, 58 and 103 kcal respectively. The enthalpy of formation of HCl gas will be

Accepted Answer

-22 kcal

Answer

-44 kcal

Answer

-88 kcal

Answer

-11 kcal

Question 16

The free energy change (∆G^o) is negative when

Accepted Answer

the system does electrical work on the surroundings

Answer

the surroundings do electrical work on the system

Answer

the surroundings do no electrical work on the system

Answer

the system does no electrical work on the surroundings

Question 17

An ester used as medicine is

Accepted Answer

methyl salicylate

Answer

ethyl acetate

Answer

ethyl benzoate

Answer

methyl acetate

Question 18

The IUPAC name of is

Accepted Answer

3,3-dimethyl-1-cyclohexanol

Answer

3,3-dimethyl-1-hydroxy cyclohexane

Answer

1,1-dimethyl-3-cyclohexanol

Answer

1,1-dimethyl-3-hydroxy cyclohexane

Question 19

Which pair of atomic numbers represent elements which are both s-block elements

Accepted Answer

3, 12

Answer

7, 15

Answer

6, 12

Answer

9, 17

Question 20

Which of the following is an example of a double salt?

Accepted Answer

Mohr's salt

Answer

silver nitrate

Answer

potassiumferricyanide

Answer

cupromonium sulphate

Question 21

What will be the e.m.f. of the given cell?
Pt | H₂(P₁)| H⁺(aq)|H₂(P₂)|Pt

Accepted Answer

RT/2F ln P₁/P₂

Answer

RT/F ln P₁/P₂

Answer

RT/F ln P₂/P₁

Answer

none of these

Question 22

At which one of the following temperature-pressure conditions, the deviation of a gas from ideal behaviour is expected to be minimum ?

Accepted Answer

550 K and 1 atm

Answer

350 K and 3 atm

Answer

250 K and 4 atm

Answer

450 K and 2 atm

Question 23

Cryolite is

Accepted Answer

Na₃AlF₆ and is used in the electrolysis of alumina for lowering the melting point of alumina

Answer

Na₃AlF₆ and is used in the electrolysis of alumina for decreasing electrical conductivity

Answer

Na₃AlF₆ and is used in the electrolytic purification of alumina

Answer

Na₃AlF₆ and is used in the electrolysis of alumina

Question 24

300 ml of a gas at 27^oC is cooled to -3^oC at consatnt pressure, the final volume is

Accepted Answer

270 ml

Answer

540 ml

Answer

135 ml

Answer

350 ml

Question 25

The strongest reducing agent of the alkali metal is

Accepted Answer

Na

Answer

Be

Answer

Li

Answer

Ca

Question 26

What is the molecular formula of Borazole?

Accepted Answer

B₃N₃H₆

Answer

B2H6

Answer

B₆N₆H₆

Answer

B₃N₃H₃

Question 27

Glass is a

Accepted Answer

Supercooled liquid

Answer

Liquid

Answer

Solid

Answer

Transparent organic polymer

Question 28

C and Si have

Accepted Answer

Different chemical and physical properties

Answer

Same physical properties

Answer

Different physical properties

Answer

Same physical but different chemical properties

Question 29

What causes nitrogen to be chemically inert ?

Accepted Answer

High bond energy

Answer

Multiple bond formation in the molecule

Answer

Absence of bond polarity

Answer

Short internuclear distance

Question 30

What is the hydrization of S in SF₄ ?

Accepted Answer