Select Chapter Topics:

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 |

65%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

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 |

55%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

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 |

66%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

What mass of urea (NH₂CONH₂) is needed to prepare 2.5 kg of a 0.25 molal solution?

1. | 39 g | 2. | 37 g |

3. | 41 g | 4. | 35 g |

Subtopic: Concentration Terms & Henry's Law |

78%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

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

Please attempt this question first.

Hints

Please attempt this question first.

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

Please attempt this question first.

Hints

Please attempt this question first.

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 |

Subtopic: Concentration Terms & Henry's Law |

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K. If the 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 |

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

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 :

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%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

If the boiling point of water at 750 mm Hg is 99.63°C, what quantity of sucrose is needed to be dissolved in 500 g of water to achieve a boiling point of 100°C?

(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%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.