(a) Is equal to its volume V (b) Is equal to p/2 (c) Is equal to its pressure p (d) Can not be determined Answer-c (25)
16.Coefficient of isothermal elasticity Eθ and coefficient of adiabatic elasticity E∅ are related by (λ = CP/CV) (a)Eθ = λE∅ (b) E∅ =λEθ (c) Eθ = …
a. NaCl structure b. Fe2 O3 structure c. CaF2 structure d. Na2 O structure Ans. a (26)
a. 6, 6 b. 8, 4 c. 4, 4 d. 4, 8 Ans. b (6)
(a) 1/4 RQ (b) 3/8 RQ (c) 3/5 RQ (d) 2/5 RQ Ans. c (77)
a. Coordination number ( 4 : 4); ccp; Zn++ ion in the alternate tetrahedral voids b. Coordination number ( 6 : 6); hcp; Zn++ ion in the alternate tetrahedral voids c. Coordination number ( 6 : 4); hcp; Zn++ ion …
Na + and Cl – ions is sodium chloride crystal is X pm, the length of the edge of the unit cell is a. 4X pm b.X/4 pm c. X/2 pm d. 2X pm Ans. d (7)
a. Increase b. Decrease c. Remain the same d. Either (b) or (c) Ans. a (11)
a. 241. 5 pm b. 165. 7 pm c. 275.1 pm d. 322. 5 pm Ans. a (10)
Na+ and Cl– ions are 95 pm and 181 pm respectively. The edge legth of NaCl unit cell is a. 276 pm b. 138 pm c. 552 pm d. 415 pm Ans. c (14)
a. Twelve b. Four c. Eight d. Six Ans. a Explanation : Coordination number in hcp and ccp arrangement is 12 while in bcc arrangement is 8. (7)
a. NaCl type b. CsCl type c. ZnS type d. None of these Ans. b Explanation : Radius ration range 0.732- 0.99 signifies coordination number 8. In CsCl coordination number ration is 8:8 (8)
a. AB6 b. AB4 c. AB8 d. AB24 Ans. b (52)
a. a b. a/2 c. √3a/2 d. 2a/√3 Ans. c Explanation : As CsCl is body-centred d = √3a/2 (13)
a. NaF b. SrF 2 c. AlCl 3 d.SiF4 Ans.b Explanation : SrF 2 has fluorite type structure. (8)
a. 2√2a b. √2a c.a / √2 d. 2a Ans. c (5)
9 x 103 kg m-3 forms face centred cubic crystals of edge length 200 √2 pm. What is the molar mass of of the solid a. 0.0432 kg mol -1 b. 0.0305 kg mol -1 c. 0.4320 kg mol-1 d. 0. 0216 …
(a) 1 mm of Hg (b) 13.6 mm of Hg (c) 1.013×105 N/m2 (d) 2.026×105 N/m2 Answer-c (11)
a. 4 b. 8 c. 12 d. 6 Ans. b Explanation : Body centered cubic lattice has a coordination number 8. (11)
(a) 19.6×108 N/m2 (b) 19.6×10-10 N/m2 (c) 19.6×1010 N/m2 (d) 19.6×10–8 N/m2 Answer-a (9)
(a) 0.01 (b) 0.06 (c) 0.02 …
(a) Young (b) Bulk (c) Maxwell (d) None of the above Answer-c (7)
10. When a pressure of 100 atmosphere is applied on a spherical ball, then its volume reduces to 0.01%. The bulk modulus of the material of the rubber in dyne/cm2 is (a) 10×1012 …
a. 4 tetrahedral voids each of which is shared by four adjacent unit cells. b. 4 tetrahedral voids within the unit cell c. 8 tetrahedral voids each of which is shared by four adjacent unit cells d. 8 tetrahedral voids …
a. 2, 4 b. 2, 2 c. 4, 2 d. 4, 4 Ans. c (3)
9. The compressibility of a material is (a) Product of volume and its pressure (b) The change in pressure per unit change in volume strain (c) The fractional change in volume per unit change in pressure (d) None of the …
a. 4 x 10 25 b. 3x 1025 c. 2x 1025 d. 1x 1025 Ans. a (6)
a. nλ = 2 θ sin θ b. nλ = 2d sin θ c. 2nλ = dsin θ d. n (θ /2) = d/2 θ Ans. b (12)
6.023 x 1023 mol -1 CsBr. the density of CsBr is a. 8.25 g/ cm3 b. 4.25 g/cm3 c. 42.5g /cm3 d. 0.425g / cm3 Ans. b (41)
a. 20/3 (πr 3 ) b. 24/ 3 (πr 3 ) c. 12/3 (πr 3 ) d. 16/3 (πr 3 ) Ans. d (11)
a. π/6 b. π 3√2 c. π /4√2 d. π/ 4 Ans. a (5)
a. 1/8 and 1/2 b. 1/2 and 1/4 c. 1/4 and 1/2 d. 1/4 and 1/8 Ans. a (10)
a. 65% b. 45% c. 90% d. 75% Ans. c (8)
Na+ and Cl – ions remaining in the unit cell are a. 4 and 4 b. 3 and 3 c. 1 and 1 d. 4 and 3 Ans. b (16)
a. 39.27 % b. 68.02% c. 74.05 % d. 78. 54 % Ans. d (5)