a. 84% HCl b. 22.2% HCl c. 63% HCl d. 20.2 % HCl Ans.d Explanation : It is known that azeotropic mixture of HCl and water has 20.2% HCl (9)
(a) π D2 σ (b) 2 π D2 σ (c) 3 π D2 σ (d) 4 π D2 σ Ans. b (4)
a. A – B interactions are stronger than those between A – A or B- B b. Vapour pressure of solution increase because more number of molecules of liquids A and B can escape from the solution c. Vapour pressure …
is 1.9 x 10-2N/m . Work done in blowing a bubble of 2.0 cm diameter will be (a) 7.6 x 10-6 π joule (b) 15.2 x 10-6 π joule (c) 1.9 x 10-6 π joule (d) 1 x 10-4 π joule …
(a) V/16 (b) V/17 (c) 16V/17 (d) …
(a) (2/9)r2[(1- ρ)/η]g (b) (2/81)r2[(ρ- 1)/η]g (c) (2/81)r4[(ρ- 1)/η]2 g (d) (2/9)r4[(ρ- 1)/η]2 g Answer-c (5)
327° C and concentraiton C osmotic pressure of a solution is P, the same solutions at concentration C/2 and a temperature 427° C shows osmotic pressure 2 atm, value of P will be a. 12/7 b. 24/7 c. 6/5 d. …
a. Δmix G = 0 at constant T and P b. Δmix S = 0 at constant T and P c. Δmix V ≠ 0 at constant T and P d. Δmix H = 0 at constant T and P …
a. Stable structure complex b. Binary liquid mixture c. Zeotropic liquid mixture d.Azeotropic liquid mixture Ans. d Explanation : Azeotropic mixture is mixture of two liquid which boils at on particular temperature like a pure liquid and distils over in …
a. 0.033 b. 0.066 c. 0.33 x 10-2 d. 3 Ans. c (5)
10 cm× 6 cm to 10 cm × 11 cm is 3 ×10-4 joule. The surface tension of the film is (a) 1.5 x 10-2N/m (b) 3.0 x 10-2N/m (c) 6.0 x 10-2N/m (d) 11 x 10-2N/m Ans. b …
Information : On adding acetone to methanol some of the hydrogen bonds between methanol molecules break a. At specific composition methanol acetone mixture will form minimum boilingg azeotrope and will show positive deviation from Raoult’s law b. At specific composition …
a. Ideal solution b. Positive deviation with non ideal solution c. Negative devitation with non ideal solution d. Normal solution Ans. c Explanation : For the solution with negative deviations there is an intermediate composition for which the vapour pressure …
Information : i. In bromoethane and chloro ethane mixture inter-molecular interaction of A – A and B- B type are nearly same as A-B type interactions ii. In ethanol and acetone mixture A- A or B- B type intermolecular interaction …
(a) No change (b) It will rise (c) It will fall (d) It may rise or fall depending on the density of block Explanation- (a) Since no change in volume of displaced water takes place, hence level of water remains …
(a) w= πr2T (b) w= 2πrT (c)w= 2πr2T (d) w= (3/4)πr3 T Ans. b (4)
(a) 0o (b) 90o (c) Less than 90o (d) Greater than 90o Ans. d (5)
a. Water-nitric acid b. Benzene- method c. Water-hydrochloric acid d. Acetone chloroform Ans. b (9)
a. ΔS mix b. ΔV mix c ΔP = PObserved – P Raoult d. ΔH mix Answer : a (15)
a. ΔS mix = 0 b. ΔH mix = 0 c. It obeys Raoult’s law d. ΔV mix = 0 ANSWER : A Explanation : For the ideal solution ΔS mix is not equal to zero (13)
a. The enthalpy of mixing is zero b. The entropy of mixing is zero c. The free energy of mixing is zero d. The free energy as well as the entropy of mixing are each zero ANSWER: A Explanation : …
a. It follows Raoult’s law b. ΔHmix = 0 c. Δ Vmix = 0 d. All of these ANSWER : D (10)
a. C2 H5 Br and C2 H5 I b. C6 H5 Cl and C6 H5Br c. C6 H6 and C6 H5 CH3 d. C2 H5 I and C2 H5 OH ANSWER : D Explanation : C2 H5 I and C2 …
(a) Greater than the work done by air friction in the second 100 m (b) Less than the work done by air friction in the second 100 m (c) Equal to 100 mg (d) Greater than 100 mg Answer-b (11)
‘η‘ with a velocity ‘v‘. The retarding viscous force acting on the spherical ball is (a) Inversely proportional to ‘r‘ but directly proportional to velocity ‘v‘ (b) Directly proportional to both radius ‘r‘ and velocity ‘v‘ (c) Inversely proportional to …
a. Acetone-Chloroform b. Acetone Benzene c. Chloroform Ether d. Chloroform Benzene ANSWER : B (36)
a. Benzene- Chloroform b. Benzene Acetone c. Benzene Ethanol d.Benzene Carbon tetrachloride ANSWER : A Explanation : Benzene chloroform solution shows negative deviation from Raoult’s law (8)
(a) 0.1 (b) 0.05 (c) 0.005 (d) 0.0005 Answer-d (2)
a. CHCl3 + (CH3 )2 CO b. (CH3 )2 CO + C6 H5 NH2 c. CHCl3 + C6 H6 d.(CH3 )2 CO + CS2 e. C6 H5 N + CH3 COOH ANSWER : D Explanation : Acetone is a polar solvent where …
70 cm3/sec. then the maximum height up to which water can rise in the tank is (a) 2.5 cm (b) 5 cm (c) 10 cm …
(1 atm = 105N/m2) then the velocity of water flowing from hole is (a) √400 m/s (b) √600 m/s (c) √60 m/s …
a. Methanol and acetone b. Chloroform and acetone c.Nitric acid and water d. Phenol and aniline ANSWER . A Explanation : In pure methnol, molecules are hydrogen bonded. One adding actone, its molecules get in between the host molecules and …
≤ x1 ≤ 1. The second component must follow Raoult’s law in the range when x2 is a. Close to zero b. Close to 1 c.0 ≤ x2 ≤ 0.5 d. 0 ≤ x2 ≤ 1 ANSWER . D Explanation : When …
3.5 × 105 N/m2. When the valve is opened, the reading of manometer falls to 3.0 × 105 N/m2, then velocity of flow of water is (a) 100 m/s (b) 10 m/s (c) 1 m/s …
from (1/√π) cm to (2/√π) cm. If the surface tension of water is 30 dynes per cm, then the work done will be (a) 180 ergs (b) 360 ergs (c) 720 ergs (d) 960 ergs Ans. c (11)
5.18 ms–1 through a pipe with a cross-sectional area of 4.20 cm2. The water gradually descends 9.66 m as the pipe increase in area to 7.60 cm2. The speed of flow at the lower level is (a) 3.0 ms–1 (b) …
(a) 4πr2T (b) 2 πr2T (c) 12 πr2T (d) 24 πr2T Ans. d (42)