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12th Chemistry Chapter 6 Solid State One Mark Question with Answer Key

Published on: 27/08/2019

Solid State

Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

Questions + Answers key

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Std: 12th Standard - Chemistry

chapter: - Model Question paper

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Questions:

Multiple Choice Question

10 x 1 = 10

Amorphous solids have _______.

(a)

Orderly arrangement of atoms

(b)

Long range of melting point

(c)

Anisotropy

(d)

both (a) and (c)

A solid with formula ABC₃ would probably have, _______.

(a)

A at body centre, B at face centres and C at corners of the cube

(b)

A at corners of cube, B at body centre, C at face centre

(c)

A at corners of hexagon, B at centres of the hexagon and C inside the hexagonal unit cell

(d)

A at corner, B at face centre, C at body centre

What is the relation between diamond and graphite?

(a)

Polymorphous

(b)

Isomer

(c)

Isotope

(d)

Isomorphous

An example of metal deficiency defect _______.

(a)

NaCl

(b)

AgCl

(c)

CsCl

(d)

FeS

Which of the following is characteristic of ionic solids?

(a)

Very low value of electrical conductivity in the molten state

(b)

Brittle nature

(c)

Very strong forces of attractions

(d)

Anisotropic nature

Which of the following cannot be regarded as molecular solid?

(a)

Silicon carbide

(b)

AIN

(c)

Diamond

(d)

All the above

The ionic radii of A⁺ and B⁻ are 0.98 x 10^-10 m and 1.81 x 10^-10m. the coordination number of each ion in AB is ________.

(a)

(b)

(c)

(d)

The number of carbon atoms per unit cell of diamond is _______.

(a)

(b)

(c)

(d)

In calcium fluoride, having the fluorite structure the coordination number of Ca²⁺ ion and F^- Ion are ________.

(a)

4 and 2

(b)

6 and 6

(c)

8 and 4

(d)

4 and 8

10.

Graphite and diamond are ________.

(a)

Covalent and molecular crystals

(b)

ionic and covalent crystals

(c)

both covalent crystals

(d)

both molecular crystals

Match the following

5 x 1 = 5

11.

Frenkel defect

12.

Schottky defect

13.

Metal deficiency defect

14.

Metal excess defect

15.

Metal deficiency defect

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Answers Key:

Multiple Choice Question

10 x 1 = 10

(d)
both (a) and (c)

(b)
A at corners of cube, B at body centre, C at face centre

(a)
Polymorphous

(d)
FeS

(d)
All the above

\(\left( \frac { r_{c^+} }{ r_{A^-} } \right) \) = \(\left( \frac { 0.98 \times 10^{-10 }}{ 1.81 \times 10^{-10} } \right) = 0.54\)
It is in the range of 0.414 to 0.732, hence the coordination number of each ion is 6.