Select Chapter Topics:

1. 1.21 m

2. 1.91 m

3. 1.71 m

4. 1.51 m

Subtopic: Concentration Terms & Henry's Law |

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The density of 20% (mass/mass) aqueous KI is 1.202 g mL^{-1}. The mole fraction of KI in the solution is:

1. 0.0223

2. 0.0343

3. 0.0163

4. 0.0263

1. 0.0223

2. 0.0343

3. 0.0163

4. 0.0263

Subtopic: Concentration Terms & Henry's Law |

52%

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The molarity of solution obtained when 30 mL of 0.5 M H_{2}SO_{4} solution diluted to 500 mL is:

1. 0.03 M

2. 0.0003 M

3. 3.0 M

4. 30 M

1. 0.03 M

2. 0.0003 M

3. 3.0 M

4. 30 M

Subtopic: Concentration Terms & Henry's Law |

81%

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The osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C is:

1. 37 Pa

2. 35 Pa

3. 31 pa

4. 41 Pa

1. 37 Pa

2. 35 Pa

3. 31 pa

4. 41 Pa

Subtopic: Osmosis & Osmotic Pressure |

59%

From NCERT

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The mass of ascorbic acid (Vitamin C, C_{6}H_{8}O_{6}) to be dissolved in 75 g of acetic acid

to lower its melting point by 1.5°C, is:

(K_{f} = 3.9 K kg mol^{−1})

1. 5.19 g

2. 5.08 g

3. 5.65 g

4. 5.48 g

to lower its melting point by 1.5°C, is:

(K

1. 5.19 g

2. 5.08 g

3. 5.65 g

4. 5.48 g

Subtopic: Depression of Freezing Point |

70%

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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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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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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

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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 |

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 |

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