CBSE
Multiple Choice QuestionsSolubility product of Mg(OH)2 at ordinary temperature is 1.96 × 10-11 pH of a saturated solution of Mg(OH)2 will be
10.53
8.47
6.94
3.47
For an ideal solution, the correct option is :
Δmix V ≠ 0 at constant T and P
Δmix H = 0 at constant T and P
Δmix G = 0 at constant T and P
Δmix S = 0 at constant T and P
The freezing point of water is depressed by 0.37°C in a 0.01 molal NaCl solution. The freezing point of 0.02 molal solution of urea is depressed by
0.37°C
0.74°C
0.185°C
0°C
The mixture that forms maximum boiling azeotrope is:
Ethanol + Water
Acetone + Carbon disulphide
Heptane + Octane
Water + Nitric acid
To observe an elevation of boiling point of 0.05°C, the amount of a solute (mol. wt. = 100) to be added to 100 g of water (Kb = 0.5) is
2 g
0.5 g
1 g
0.75 g
Chloroform, when kept open, is oxidised to :
CO2
COCl2
CO2, Cl2
None of these
Which of the following will show a negative deviation from Raoult's law?
Acetone-benzene
Acetone-ethanol
Benzene-methanol
Acetone-chloroform
Blood cells will remain as such in:
hypertonic solution
hypotonic solution
isotonic solution
none of the above
