An aqueous solution of borax is________.

(a)

neutral

(b)

acidic

(c)

basic

(d)

amphoteric

Boric acid is an acid because its molecule________.

(a)

contains replaceable H⁺ ion

(b)

gives up a proton

(c)

combines with proton to form water molecule

(d)

accepts OH^- from water, releasing proton.

In diborane, the number of electrons that accounts for banana bonds is ________.

(a)

six

(b)

two

(c)

four

(d)

three

The element that does not show catenation among the following p-block elements is ________.

(a)

Carbon

(b)

silicon

(c)

Lead

(d)

germanium

Carbon atoms in fullerene with formula C₆₀ have _______hybridisation.

(a)

sp³ hybridised

(b)

sp hybridised

(c)

sp² hybridised

(d)

partially sp² and partially sp³ hybridised

Lewis acid character of boron trihalides is as a follows _______.

(a)

BF₃ > BCl₃ > BBr₃ > BI₃

(b)

BCI₃ > BF₃ > BBr₃ > BI₃

(c)

BI₃ > BBr₃ > BCl₃ > BF₃

(d)

BI₃ > BF₃ > BCl₃ > BBr₃

Select the incorrect statement regarding B₂H₆.

(a)

It contains B-B ionic bond

(b)

Each boron is Sp³ hybridised

(c)

It has two types of hydrogen bonds

(d)

it is used as a reducing agent

The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.

(a)

TI < In < Ga < Al

(b)

In < TI < Ga < Al

(c)

Ga < In < Al < TI

(d)

Al < Ga < In < TI

Which one of the following compounds has similar structure to that of graphite?

(a)

Boron nitride

(b)

Boron Carbide

(c)

Aluminium Carbide

(d)

Aluminium Oxide

Chemical formula of phosgene is_______.

(a)

COCl₂

(b)

CaOCl₂

(c)

CaCO₃

(d)

COCI

Potash alum

(1)

Colourless crystal

Sodium alum

(2)

K₂SO₄·Cr₂(SO₄)₃.24.H₂O

Ammonium alum

(3)

K₂SO₄·Cr₂(SO₄)₃.24.H₂O

Chrome alum

(4)

Inert gases

Group 18

(5)

Non - flammable gas

Borax

(6)

Na₂SO₄·AI₂(SO₄)₃·24H₂O

Boric acid

(7)

B-H bonds

Diborane

(8)

Graphite

Carbon

(9)

(NH₄)₂SO₄·AI₂(SO₄)₃.24H₂O

Carbon dioxide

(10)

Sodium salt