The dissolution of gasecous O_2 in water is exothermic. to increase the solutusi

Question

The dissolution of gasecous O_2 in water is exothermic. to increase the solutusity of OA(g) in water, the water's temperature and the O_3 pressure above the water (A) decrease, decrease (B) decrease, increase (C) increase, decrease (D) increase, increase 58. Which aquous solutions has the highest normal boiling point? (A) 0.1 m K, PO_1 (B) 0.1 m NaC1 (C) 0.1 m C_2H_3OH (D) They all have the same boiling point.59. Which compound is least soluble in water? (A) CH_3OH (B) CH_3CH_2OH (C) CH_3CH_2CH_2OH (D) CH_3CH_2CH_2CH_2OH 60. At 23.0degree the vapor pressure of water is 21.1 mmHg. If 8 55 g of sucrose is added to 17.6 g of water. what is the vapor pressure of the solution? (A) 21.1 mmHg. If 8.55 g of sucrose is added to 17.6 g of water, what is the vapor pressure of the solution? (A) 21.1 mmHg (B) 206 mmHg (C) 17.6 mmHg (D) 14.2 mmHg 61. A sample of seawater is 3.57% by mass NaCl. The density of seawater is 1.02 g mL-^1. What is the molar concentration of NaCl in these sample of seawater? (A) 0.599 M (B) 0.611 M (c) 0.623 M (D) 0.633 M 62. For the reaction A(g) rightarrow B(g), Q_e = 15 and K =5.5. Which statement is true? (A) G and Gdegree and both positive. (B) G and Gdereee are both negative. (c) G is positive and Gdegree is negative (D) G is negative and Gdegree is positive.

Explanation / Answer

57. (B) [Le Chatelliers Principle]

58. (A) [Maximum number of ions generated ; Rault's law of elevation of boiling point]

59. (D) [Due to longest hydrocarbon chain which is hydrophobic]

60. (B) [calculate the mole fraction]

61. (C)

62. (B)

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