cm3 of acetone is added to 100 cm3 of water, the vapour pressure of water over the solution a. it will be equal to the vapour pressure of pure water b. It will be less than the vapour pressure of …
a. Solute molecules and solvent molecules b. Solute molecules and the total molecules in the solution c. Solvent molecules and the total molecules in the solution d. Solvent molecules and the total number of ions of the solute Ans. b …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
a. Equal to that of water b. Equal to that of methanol c. More than that of water d. Less than that of water Ans. c Explanation : Methanol has low boiling point than H2 O lower is boiling point …
(a) Rubber, brass and steel respectively (b) Brass, steel and rubber respectively (c) Steel, brass and rubber respectively (d) Steel, rubber and brass respectively Answer-c (7)
(a) Sand R (b) T and S (c) R and S (d) S and T Answer-d (25)
2985 N / m2 . The vapour pressure of pure water is 3000 N/ m2 . The molecular weight of the solute is a. 60 b. 120 c. 180 d. 380 Ans. c (13)
(a) A is brittle but B is ductile (b) A is ductile and B is brittle (c) Both A and B are ductile (d) Both A and B are brittle Explanation-(b) In ductile materials, yield point exist while in …
(a) 9 : 1 (b) 1 : 9 (c) 3 : 1 (d) 1 : 3 Ans. c (11)
(a) 2 : 3 (b) 3 : 2 (c) 3 : 4 (d) 4 : 3 Ans. b (10)
25 ° C .(Given : Vapour pressure Date at 25 ° C benzene = 12.8 κPa, Toluene = 3.85 κPa ) a. The vapour will contain a higher percentage of benzene b. The vapour will contain a higher percentage of toluene …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
2 ° C . Assuming concentration of solute is much lower than the concentration of solution is a. 724 b. 740 c. 736 d. 718 Ans. a (37)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
a. Concentration of solution containing non-volatile solute b. Temperature upto boiling point c. Temperature upto triple point d. Altitude of the concerned place of boiling Ans : b (13)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
PA o : PB o = 1 : 2 and have mole fraction in solution 1: 2 then mole fraction of A in vapours a. 0.33 b. 0.25 c. 0.52 d. 0.2 Ans. d (12)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) 10 m (b) 20 m (c) 60 m (d) 30 m Answer-b (7)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
25 C is 23. 8 mm Hg a. 1.25 mm Hg b. 0.125 mm Hg c. 1.15 mm Hg d. 00.12 mm Hg Ans. b (12)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
20° C are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in the vapour phase would be a. 0.549 b. 0.200 c. 0.786 d. 0.478 Ans. d (13)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
a. 1 M C12 H22 O11 b. 1 M CH3 COOH c. 1 M CaCl 2 d. 1 M NaCl Ans. a (13)
At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution a. Vapour pressure in container (A) is more than that in container (B) b. Vapour pressure in …
(a) Weight hung and length increased (b) Stress applied and length increased (c) Stress applied and strain developed (d) Length increased and weight hung Answer-c (5)
0.1 °C higher than that of the pure ether. The molecular weight of the substance will be be a. 148 b. 158 c. 168 d. 178 Ans. b (10)
16. The diagram shows the change x in the length of a thin uniform wire caused by the application of stress F at two different temperatures T1 and T2. The variations shown suggest that (a) T1 > T2 (b) T1 < T2 …
CH4 and H2 are mixed in an empty container at 25° C. The fraction of the total pressure exerted by H2 is a. 1/9 b. 1/2 c. 8/9 d. 16/17 Ans. c (15)
a. Same as that of 2nd solution b. Nearly one fifth of the 2nd solution c. Double that of 2nd solution d. Nearly five times that of 2nd solution Ans. a (15)
(a) 9×1011 (b) 8×1011 (c) 10×1011 (d) 2×1011 Answer-d (6)
a. Vapour pressure of solute is zero b. Vapour pressure of solvent is zero c. Vapour pressure of solution is more than vapour pressure of solvent d. all of the options Ans. a Explanation : Non volatile solute always have …