Stoichiometry

161. If a solution of eutectic composition is cooled, _________ reaching the eutectic temperature?

1. The solvent begins to freeze out even before
2. It will undergo no change until
3. It will not solidify even on
4. None of these

View answer

162. If pH value of a solution is 8, then its pOH value will be

1. 6
2. 1
3. 7
4. 10

View answer

163. If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _________ times.

1. 10
2. 100
3. 1000
4. 10000

View answer

164. If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will

1. Remain unaltered
2. Increase nine fold
3. Increase three fold
4. Decrease three fold

View answer

165. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its

1. Bubble point
2. Saturation temperature
3. Dew point
4. Both (B) and (C)

View answer

166. If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change _________ times.

1. 10
2. 20
3. 70
4. 100

View answer

167. If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will

1. Be reduced to 1/4th
2. Increase four times
3. Increase two times
4. None of these

View answer

168. In _________ process, ions of salts react with water to produce acidity or alkalinity.

1. Hydration
2. Hydrolysis
3. Electrolysis
4. Dialysis

View answer

169. In a binary liquid solution of components „A‟ and „B‟, if component „A‟ exhibits positive deviation from Raoult's law, then component „B‟

1. Exhibits positive deviation from Raoult's law
2. Exhibits negative deviation from Raoult's law
3. Obeys Raoult's law
4. May exhibit either positive or negative deviation from Raoult's law

View answer

170. In a binary liquid system, the composition expressed as _________ is independent of the temperature & pressure.

1. Kg of solute/kg of solvent
2. Kg-mole of solute/kg-mole of solvent
3. Kg-mole of solute/1000 kg of solvent
4. All (A), (B) & (C)

View answer