Test Preparation on IIT JEE Mains Mock Test-7

CHEMISTRY
Hydrolysis of one mole of peroxodisulphuric acid produces

1two moles of sulphuric acid
2two moles of peroxomonosulphuric acid
3one mole of sulphuric acid and one mole of peroxomonosulphuric acid
4one mole of sulphuric acid , one mole of peroxo monosulphuric acid and one mole of hydrogen peroxide.

Hydrolysis of peroxodisulphuric acid produces
sulphuric acid and peroxomono sulphuric acid

Which of the following statements about electronegativity is the correct one?

1Electronegativity is the energy released when an electron is added to an atom of the element.
2Electronegativity is the reciprocal of ionisation energy.
3Electronegativity is the difference between ionisation energy and electron affinity of an element.
4Electronegativity of an element is its tendency to acquire electron(s).

Electronegativity of an element is its tendency to
acquire electrons.

The dissociation constant of a monobasic acid is Error! Bookmark not defined.1.0 × 10–9. The pH of its 0.1 M aqueous solution is:

Ka = 1.0 x 10-9;
a=√ka/c= √1.0x10^-9=1.0x10^-4

[H+] = cα = 0.1 x 1.0 x 10-4 = 1.0 x 10-5
pH = - log[H+] = -log (1.0 x 10-5 ) = 5

Mixing 0.10 mole of NaOH, 0.10 mole of HC2H3O2(acetic acid) and 1 litre of water yields a solution which is

1acidic
2neutral
3basic
4red

CH3COOH + NaOH → CH3COONa + H2O
weak acid strong base
CH3COONa is a salt of weak acid and strong base
so its aqueous solution is basic

When phenol is heated strongly with zinc dust the product formed is

1diphenyl ether
2benzene
3dibenzyl
4o-hydroxy benzoic acid

Phenol on heating with Zn dust forms benzene.

Chlorobenzene can be prepared by treating
aniline with

1HCl
2cuprous chloride
3Cl2 in the presence of anhydrous aluminium chloride
4HNO2 followed by heating with cuprous chloride

An aromatic amine quickly reacts with HNO2, HCl
to form an aryl diazonium salt, which decomposes
in the presence of copper(I) chloride, to form the
desired aryl halide. The reaction is called
Sandmeyer reaction.

Which of the following reactions cannot be used for the reduction of >C=O to >CH2

1Clemmensen reaction
2Wolff-Kishner reaction
3Wurtz reaction
4HI and red P

Wurtz reaction is used for converting alkyl halides
into alkanes;
RX + Na + XR → R-R

Clemmensen reduction, Wolf Kishner reaction and
reaction with HI/P are used for conversion of
>C=O to >CH2

The standard E.M.F. for the cell reaction:
Zn(s) +Cu2+(aq)  Zn2+(aq) + Cu(s) is 1. 10 volts at 25°C. The EMF. for the cell reaction when 0.01 M Cu2+ and 0.1 M Zn2+ solutions are used at 25° C is:

11.07 V
20.110 V
3– 1.10 V
4–0.110 V

The solutions A and B are 0.1 and 0.2 molar in a substance. If 100 ml of A is mixed with 25ml of B, and there is no change in volume, then the final molarity is

10.15
20.18
30.20
40.12

M1V1 + M2V2 = M3V3
0.1 x 100 + 0.2 x 25 = M3 x 125

10 + 5 = 15 = M3 x 50
M3 = 15/125 = 0.12 M


Right Ans	Wrong Ans	Not Attempted

CHEMISTRYHydrolysis of one mole of peroxodisulphuric acid produces