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GS
GS Set-1
Chemistry
Physical Chemistry
177

Physical Chemistry MCQ with Answers

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.

Physical Chemistry MCQ with Answers

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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

179) A bottle of cold drink contains 200 mL liquid in which CO₂ is 0.1M. Suppose CO₂ behaves like an ideal gas, the volume of the dissolved CO₂ at STP is:

0.224 L

0.448 L

22.4 L

2.24 L

Answer is:

0.448 L

180) If HCOOH + NaOH ⇶ HCOONa + H₂O, ΔH = −13.1 kcal, then enthalpy of dissociation of HCOOH will be:

600 cal

60 cal

−600 cal

Can not be calculated

Answer is:

600 cal

181) For which of the following cases, dS = dH⁄T:

A process for which ΔC_p = 0, but ΔC_v ≠ 0

An isothermal process in which reversible phase transition takes place

An isobaric process

An adiabatic process

Answer is:

An adiabatic process

Physical Chemistry MCQ with Answers

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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

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

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

179) A bottle of cold drink contains 200 mL liquid in which CO2 is 0.1M. Suppose CO2 behaves like an ideal gas, the volume of the dissolved CO2 at STP is:

0.448 L

180) If HCOOH + NaOH ⇶ HCOONa + H2O, ΔH = −13.1 kcal, then enthalpy of dissociation of HCOOH will be:

600 cal

181) For which of the following cases, dS = dH⁄T:

An adiabatic process

Physical Chemistry MCQ with Answers

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:

179) A bottle of cold drink contains 200 mL liquid in which CO₂ is 0.1M. Suppose CO₂ behaves like an ideal gas, the volume of the dissolved CO₂ at STP is:

180) If HCOOH + NaOH ⇶ HCOONa + H₂O, ΔH = −13.1 kcal, then enthalpy of dissociation of HCOOH will be: