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GS Set-1
Chemistry
Physical Chemistry
174

Physical Chemistry MCQ with Answers

174) If a vessel containing hydrogen chloride at a pressure P is connected with another vessel of the same volume containing ammonia at a pressure P and the connecting tube opened so that they can mix and form a white solid, then the gas pressure:

Is equal to the pressure P

Will be P⁄P = 1

Will be doubled, i.e. 2P

Drops to zero

Answer is:

Drops to zero

Explanation:

Both gases react to give a white solid, NH₄Cl.

Physical Chemistry MCQ with Answers

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175) A balloon filled with methane is pricked with a sharp point and quickly plunged into a tank of hydrogen at the same pressure. After sometime, the balloon will have:

Enlarged

Collapsed

Remain unchanged in size

Have ethylene inside it

Answer is:

Enlarged

Explanation:

Rate of diffusion of hydrogen is greater than that of methane.

176) The average kinetic energy of one molecule of an ideal gas at 27^oC and 1 atm pressure is:

900 cal⁄K molecule

6.21 x 10⁻²¹ J⁄K molecule

336.7 J⁄K molecule

3741.3 J⁄K molecule

Answer is:

6.21 x 10⁻²¹ J⁄K molecule

177) The pressure P of a gas is plotted against its absolute temperature T for two different constant volumes, V1 and V2. When V1 > V2, the:

Curves have the same slope and do not intersect

Curves must intersect at some point other than T = 0

Curve for V2 has a greater slope than that of V1

Curve for V1 has a greater slope than that of V2

Answer is:

Curve for V2 has a greater slope than that of V1

Explanation:

At constant volume, P is directly proportional to T.

178) A balloon filled with hydrogen at 1 atm and 27^oC has volume equal to 12000 L. On ascending, it reaches a place where the temperature is −23^oC and pressure is 0.5 atm. The volume of the balloon is:

24000 L

20000 L

10000 L

12000 L

Answer is:

20000 L

Physical Chemistry MCQ with Answers

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174) If a vessel containing hydrogen chloride at a pressure P is connected with another vessel of the same volume containing ammonia at a pressure P and the connecting tube opened so that they can mix and form a white solid, then the gas pressure:

Drops to zero

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

175) A balloon filled with methane is pricked with a sharp point and quickly plunged into a tank of hydrogen at the same pressure. After sometime, the balloon will have:

Enlarged

176) The average kinetic energy of one molecule of an ideal gas at 27oC and 1 atm pressure is:

6.21 x 10−21 J⁄K molecule

177) The pressure P of a gas is plotted against its absolute temperature T for two different constant volumes, V1 and V2. When V1 > V2, the:

Curve for V2 has a greater slope than that of V1

178) A balloon filled with hydrogen at 1 atm and 27oC has volume equal to 12000 L. On ascending, it reaches a place where the temperature is −23oC and pressure is 0.5 atm. The volume of the balloon is:

20000 L

Physical Chemistry MCQ with Answers

176) The average kinetic energy of one molecule of an ideal gas at 27^oC and 1 atm pressure is:

6.21 x 10⁻²¹ J⁄K molecule

178) A balloon filled with hydrogen at 1 atm and 27^oC has volume equal to 12000 L. On ascending, it reaches a place where the temperature is −23^oC and pressure is 0.5 atm. The volume of the balloon is: