JIPMER Chemistry Mock Test - 4

Question 1

Identify B in the following reaction

Accepted Answer

C2H6

Answer

CH4

Answer

C₂H₅Cl

Answer

C₂H₅OH

Question 2

Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-Dinitrochlorobenzene is readily replaced because

Accepted Answer

NO₂ withdraws electrons at ortho and para positions

Answer

NO₂ makes the electron rich ring at ortho and para positions

Answer

NO₂ withdraws electrons at metaposition

Answer

NO₂ donate electrons at m-position

Question 3

In its reaction with silver nitrate acetylene shows

Accepted Answer

Acidic property

Answer

Oxidising property

Answer

Reducing property

Answer

Basic property

Question 4

1-Butyne reacts with cold alkaline KMnO₄ to yield

Accepted Answer

CH₃CH₂COOH + CO₂

Answer

CH₃CH₂CH₂COOH

Answer

CH₃CH₂COOH

Answer

CH₃CH₂COOH + HCOOH

Question 5

When a mixture of solid NaCl, solid K₂Cr₂O₇ is heated with conc.H₂SO₄, orange red vapour are obtained. These are of the compound

Accepted Answer

Chromyl chloride

Answer

Chromous chloride

Answer

Chromic chloride

Answer

Chromic sulphate

Question 6

An ion has 18 electrons in the outermost shell. The ion is

Accepted Answer

Cu&#8314;

Answer

K&#8314;

Answer

Cs&#8314;

Answer

Th&#8314;

Question 7

Which of the following sets of quantum numbers is not possible?

Accepted Answer

n = 3,l = 0,m = -1

Answer

n = 3,l = 2,m = +1

Answer

n = 3,l = 2,m = -1

Answer

n = 3,l = 2,m = 0

Question 8

The value of the energy for the first excited state of hydrogen will be

Accepted Answer

-3.40 eV

Answer

-13.6 eV

Answer

-1.51 eV

Answer

-0.85 eV

Question 9

The moleucle that deviated from octet rule is

Accepted Answer

BeCl2

Answer

NaCl

Answer

MgO

Answer

NH3

Question 10

Electrophiles are

Accepted Answer

electron loving species

Answer

electron hating species

Answer

nucleus loving reagents

Answer

nucleus hating reagents

Question 11

Which pair among the following is isostructural?

Accepted Answer

XeF₂, IF₂^-

Answer

NH₃, BF₃

Answer

CO₃^2- SO₃^2-

Answer

PCl₅, ICl₅

Question 12

Since enthalpy of elements in their natural state is taken to the zero .The value of ∆H_f of compounds

Accepted Answer

may be positive or negative

Answer

is always negative

Answer

is always positive

Answer

is zero

Question 13

The state of equilibrium refers to

Accepted Answer

Dynamic state

Answer

State of rest

Answer

Stationary state

Answer

State of inertness

Question 14

Which one of the following statement is false?

Accepted Answer

work is a state function

Answer

temperature is a state function

Answer

work appears at the bondary of the system

Answer

change in the state depends upon initial and final states

Question 15

The first order rate constant for the decomposition of N₂O₅ is 6.25 x 10^-4second^-1. The half-life for this decomposition is

Accepted Answer

1117.7

Answer

111.7

Answer

223.4

Answer

160.9

Question 16

The equilibrium constant for a reaction is 73 at 298 K. The value of standard free energy change is

Accepted Answer

10.63 KJ-mol^-1

Answer

5.56 KJ-mol^-1

Answer

7.79 KJ-mol^-1

Answer

12.64 KJ-mol^-1

Question 17

Tranquilisers are substances used for the treatment of

Accepted Answer

Mental diseases

Answer

Cancer

Answer

AIDS

Answer

Physical disorders

Question 18

The IUPAC name of CH₃CH=CHCOOC₂H₅ is

Accepted Answer

Ethyl but-2-enoate

Answer

Ethyl but-1-enoate

Answer

Ethyl prop-3-enoate

Answer

None of these

Question 19

Which of the following statement about fluorine is not correct?

Accepted Answer

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Answer

Electron affinity of chlorine is greater than that of fluorine

Answer

Bond energy of fluorine is less than that of chlorine

Answer

Fluorine does not form oxoacid

Question 20

How many EDTA (ethylemediaminetetra acetic acid) molecules are required to make an octahedral complex with Ca²⁺ ion?

Accepted Answer

one

Answer

six

Answer

three

Answer

two

Question 21

In the reaction A + e⁻ → A⁻

Accepted Answer

A is readily reduced

Answer

A is readily oxidised

Answer

A⁻ is readily oxidised

Answer

A⁻ is readily reduced

Question 22

Which of the following statements is false for alkali metals?

Accepted Answer

Sodium is amphoteric in character

Answer

Lithium is the strongest reducing agent

Answer

Li⁺ ion is exceptionally small

Answer

All alkali metals give blue solution in liquid ammonia

Question 23

3.2 oxygen is diffused in 10 minutes. In similar conditions, 2.8 g nitrogen will diffuse in

Accepted Answer

9.3 minutes

Answer

8.2 minutes

Answer

7.6 minutes

Answer

11.8 minutes

Question 24

20 litres of hyydrogen gas at STP weigh about

Accepted Answer

1.3 gm

Answer

12.2 gm

Answer

44.8 gm

Answer

20 gm

Question 25

Al is more rective than Fe but Al is less easily corroded than Fe because

Accepted Answer

Oxygen forms a protective oxide layer

Answer

It is a noble metal

Answer

Iron undergoes reaction easily with water

Answer

Fe form mono and divalent ions

Question 26

The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to

Accepted Answer

First group

Answer

Third group

Answer

Fifth group

Answer

First transition series

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

Same physical but different chemical properties

Answer

Same physical properties

Answer

Different physical properties

Answer

Different chemical and physical properties

Question 29

Which of the following is the correct statement for PH₃?

Accepted Answer

It is less basic than NH₃

Answer

It is less poisonous than NH₃

Answer

Electronegativity of PH₃ > NH₃

Answer

It does not show reducing properties

Question 30

Na₂S₂O₃ is prepared by

Accepted Answer

Heating NaOH and S

Answer

Reacting H₂S₂O₃ with NaOH

Answer

Reducing Na₂SO₄ with S in alkaline medium

Answer