The type of inter molecular interactions present in
(a) | n-hexane and n-octane | (i) | Van der Waal’s forces of attraction |
(b) | NaClO4 and water | (ii) | ion-dipole interaction |
(iii) | dipole-dipole interaction |
(a) | (b) | |
1. | (i) | (ii) |
2. | (ii) | (ii) |
3. | (i) | (iii) |
4. | (iii) | (iii) |
The insoluble compound in water is /are
1. Phenol
2. Formic acid and toluene
3. Phenol and toluene
4. Toluene and chloroform
If the solubility product of CuS is 6 × 10–16, the maximum molarity of CuS in an aqueous solution will be
1. | 1.45 × 10−8 mol L−1 | 2. | 3.45 × 10−8 mol L−1 |
3. | 2.45 × 10−8 mol L−1 | 4. | 4.25 × 10−8 mol L−1 |
The mass percentage of aspirin (C9H8O4) in acetonitrile (CH3CN) when 6.5 g of C9H8O4 is dissolved in 450 g of CH3CN will be:
1. | 1.424% | 2. | 4.424% |
3. | 5.124% | 4. | 2.124% |
Nalorphene (C19H21NO3), similar to morphine, is used to combat withdrawal symptoms in narcotic users. The dose of nalorphene generally given is 1.5 mg.
Calculate the mass of 1.5 × 10−3m aqueous solution required for the above dose.
1. | 13.22 g | 2. | 3.22 g |
3. | 11.22 g | 4. | 9.22 g |
The amount of benzoic acid (C6H5COOH) required for preparing 250 mL of 0.15 M solution in methanol is -
1. | 4.57 g | 2. | 3.57 g |
3. | 1.57 g | 4. | 12.57 g |
The depression in the freezing point of water was observed for the same amount of acetic acid, trichloroacetic acid, and trifluoroacetic in the order of-
1. acetic acid < trichloroacetic acid < trifluoroacetic acid
2. acetic acid > trichloroacetic acid > trifluoroacetic acid
3. acetic acid < trichloroacetic acid > trifluoroacetic acid
4. acetic acid > trichloroacetic acid < trifluoroacetic acid
The depression in the freezing point of water when 10 g of CH3CH2CHClCOOH is added to 250 g of water will be -
(Ka = 1.4 × 10–3, Kf = 1.86 K kg mol-1)
1. 0.32 K
2. 2.87 K
3. 0.65 K
4. 5.03 K
19.5 g of CH2FCOOH is dissolved in 500 g of water. The van’t Hoff factor and dissociation constant of fluoroacetic acid will be respectively -
( = 1.00 K )
1) 20.75 , 4.77 x 10-3
2) 1.075 , 4.77 x 10-2
3) 2.073 , 3.07 x 10-4
4) 1.075 , 3.07 x 10-3
100 g of liquid A (molar mass 140 g mol–1) was dissolved in 1000 g of liquid B (molar mass 180 g mol–1). The vapour pressure of pure liquid B was found to be 500 torr. If the total vapour pressure of the solution is 475 torr, the vapour pressure of pure liquid A will be -
1. 326 torr
2. 226 torr
3. 360.7 torr
4. 280.7 torr