Chemistry XII+ - Solid State 07

Question : 1

(skipped)

Excess of lithium makes LiCl crystal

Options:

	Pink colour
	Violet colour
	Red colour
	No colour

Solution :

Pink colour, as metal excess due to anion vacancy.

You scored 0 of 1

Question : 2

(skipped)

Intrinsic or thermodynamic defects includes

Options:

	Schottky defect
	Metal excess defect
	Metal deficiency defect
	All of these

Solution :

Intrinsic or thermodynamic defect are stoichiometric defect

You scored 0 of 1

Question : 3

(skipped)

When AgCl is doped by cadmium chloride, then

Options:

	Cationic vacancy is triple in number than that of cadmium ions
	Cationic vacancy is double in number than that of cadmium ions
	Cationic vacancy is equal in number than that of cadmium ions
	No cationic vacancy

Solution :

You scored 0 of 1

Question : 4

(skipped)

Which is not correct regarding Frenkel defect?

Options:

	It creates both vacancy defect and interstitial defect
	Smaller ion (usually cations) is dislocated from its site
	It decreases the stability of the solid crystal
	It decreases dielectric constant of the medium

Solution :

Frenkel defect increases dielectric constant of the medium.

You scored 0 of 1

Question : 5

(skipped)

Which is mismatched regarding the examples indicates?

Options:

	Anti-ferroelectric – PbZrO3
	Ferroelectric – BaTiO3, KH2PO4
	Anti-ferromagnetic – MnO
	Ferrimagnetic – CrO2, MgFe2O4

Solution :

CrO₂is ferromagnetic.

You scored 0 of 1

Question : 6

(skipped)

If NaCl has 10% Schottky defect, then the number of formula unit of NaCl per unit cell will be

Options:

	4
	3.6
	0.4
	0.1

Solution :

You scored 0 of 1

Question : 7

(skipped)

In NaCl structure one Schottky defect is present per how many ions?

Options:

	106
	1010
	1016
	1022

Solution :

You scored 0 of 1

Question : 8

(skipped)

The correct statement among following is

Options:

	On heating substance lose their ferrimagnetism and becomes paramagnetic
	There is large forbidden zone present in insulators between valence and conduction band
	Ferrimagnetic substances would make better permanent magnets then ferromagnetic substances
	Both (1) & (2)

Solution :

Ferromagnetic substances make better permanent magnets.

You scored 0 of 1

Question : 9

(skipped)

The percentage by number of ferrous ions present in Fe_0.95O will be

Options:

	10.5%
	15%
	85%
	89.5%

Solution :

You scored 0 of 1

Question : 10

(skipped)

If NaCl is doped by 10^–5% SiCl₄, then the concentration of cationic vacancy will be

Options:

	1.204 × 1017
	1.806 × 1017
	1.806 × 1019
	2.408 × 1017

Solution :