Mock Test 1 — Solid State

Anisotropy is characteristic of:

Coordination number in NaCl:

Packing efficiency of FCC:

Density of FCC with $a = 400$ pm, $M = 60$ g/mol (approx):

Schottky defect is seen in:

AgI shows:

Number of octahedral voids in 1 mole CCP atoms:

F-centre in NaCl heated in Na vapor:

Curie temperature of Fe is approximately:

p-type semiconductor:

Number of atoms in BCC unit cell:

Coordination number in body-centred cubic:

Number of tetrahedral voids for $1$ atom in CCP:

Assertion (A): FCC and HCP both have packing efficiency $74\%$. Reason (R): Both involve identical sphere-packing arrangement in 3D with $12$ coordination number.

Assertion (A): Frenkel defect increases ionic conductivity. Reason (R): Frenkel defect creates an interstitial cation and a vacancy, both of which can act as carriers under electric field.