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If 22 g of benzene is dissolved in 122 g of carbon tetrachloride then the mass percentage of benzene (C_{6}H_{6}) and carbon tetrachloride (CCl_{4}) are respectively:

1. 86.32 %; 13.68 %

2. 13.68 %; 86.32 %

3. 84.72 %; 15.28 %

4. 15.28 %; 84.72 %

1. 86.32 %; 13.68 %

2. 13.68 %; 86.32 %

3. 84.72 %; 15.28 %

4. 15.28 %; 84.72 %

Subtopic: Concentration Terms & Henry's Law |

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The mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride is-

1. 0.528

2. 0.618

3. 0.458

4. 0.338

1. 0.528

2. 0.618

3. 0.458

4. 0.338

Subtopic: Concentration Terms & Henry's Law |

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The molarity of 30 g Co(NO_{3})_{2}. 6H_{2}O in 4.3 L of solution is:

1. 0.053 M

2. 0.043 M

3. 0.023 M

4. 0.063 M

Subtopic: Concentration Terms & Henry's Law |

65%

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The mass of urea (NH_{2}CONH_{2}) required to make 2.5 kg of 0.25 molal aqueous solution is-

1. 39 g

2. 37 g

3. 41 g

4. 35 g

1. 39 g

2. 37 g

3. 41 g

4. 35 g

Subtopic: Concentration Terms & Henry's Law |

77%

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Calculate the molarity of the KI solution, provided its density is 1.202 g mL^{-1} and it consists of a 20% (mass/mass) concentration.

1. 1.25 M

2. 1.95 M

3. 1.45 M

4. 2.15 M

1. 1.25 M

2. 1.95 M

3. 1.45 M

4. 2.15 M

Subtopic: Concentration Terms & Henry's Law |

62%

From NCERT

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The solubility of H_{2}S in water at STP is 0.195 m, The value of Henry’s law constant will be-

1. | 274 atm | 2. | 285 atm |

3. | 295 atm | 4. | 278 atm |

Subtopic: Concentration Terms & Henry's Law |

53%

From NCERT

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Henry’s law constant for CO_{2} in water is 1.67 × 10^{8} Pa at 298 K. The quantity of CO_{2} in 500 mL of soda water when packed under 2.5 atm CO_{2} pressure at 298 K is-

1. 1.24 g

2. 1.45 g

3. 1.65 g

4. 1.85 g

1. 1.24 g

2. 1.45 g

3. 1.65 g

4. 1.85 g

Subtopic: Concentration Terms & Henry's Law |

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The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K. If total vapour pressure is 600 mm Hg then the composition of the vapour phase are-

1. X_{A}=0.30; X_{B}=0.70

2. X_{A}=0.40; X_{B}=0.60

3. X_{A}=0.20; X_{B}=0.90

4. X_{A}=0.50; X_{B}=0.50

Subtopic: Raoult's Law |

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Vapour pressure of pure water at 298 K is 23.8 mm Hg. 50 g of urea (NH_{2}CONH_{2}) is dissolved in 850 g of water.

The vapour pressure of water (in mm Hg) for this solution is :

1. 23. 40

2. 0.23

3. 12.87

4. 40 .14

The vapour pressure of water (in mm Hg) for this solution is :

1. 23. 40

2. 0.23

3. 12.87

4. 40 .14

Subtopic: Raoult's Law |

64%

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Boiling point of water at 750 mm Hg is 99.63°C. The amount of sucrose added to 500 g of water so that solution boils at 100°C is-

(Molal elevation constant for water is 0.52 K kg mol^{−1} )

1. 128.17 g

2. 121.67 g

3. 125.57 g

4. 116.27 g

(Molal elevation constant for water is 0.52 K kg mol

1. 128.17 g

2. 121.67 g

3. 125.57 g

4. 116.27 g

Subtopic: Elevation of Boiling Point |

63%

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