At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to

STP-তে একটি আদর্শ গ্যাসকে প্রথমে তার প্রাথমিক আয়তনের এক-তৃতীয়াংশে সংকুচিত করা হয়, এবং তারপর প্রসারিত হতে দেওয়া হয় যতক্ষণ না তার চাপ প্রাথমিক চাপের অর্ধেক হয়। উভয় প্রক্রিয়ায় গ্যাসের তাপমাত্রা স্থির থাকে। যদি গ্যাসের প্রাথমিক অভ্যন্তরীণ শক্তি । হয়ে থাকে তাহলে এর চূড়ান্ত অভ্যন্তরীণ শক্তি কত? (An ideal gas at STP is first compressed to one-third of its initial volume and then allowed to expand until its pressure is half the initial pressure. The temperature of the gas remains constant during both the processes. If the initial internal energy of the gas is U, what is its final internal energy?)

A

U/3

B

U/2

C

U

D

2U/3

According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.

A

Change

B

Do not change

C

Both (A) and (B)

D

None of these

For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.

A

Sodium chloride

B

Sodium carbonate monohydrate

C

Anhydrous sodium sulphate

D

Hypo

A delivery car went from Candleford to Lark Rise and back at an average speed of23 miles per hour. If the distance from Candleford to Lark Rise is 1 mile, and the trip back too half as much time as the trip there, what was the average speed of the delivery car on the way to Lark Rise?

A

13

B

34

C

12

D

23

A delivery cart went from Candle ford to Lark Rise and back at an average speed of 2/3 miles per hour. If the distance from Candle ford to Lark Rise is 1 mile, and the trip back took half as much time as the trip there, what was the average speed of the delivery cart on the way to Lark Rise?

A

1/3

B

3/4

C

1/2

D

2/3

In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is

A

More

B

Less

C

Same

D

Unpredictable; depends on the particular reaction

In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants )

A

Addition of inert gas favours the forward reaction, when Δx is positive

B

Pressure has no effect on equilibrium, when Δn = 0

C

Addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero)

D

All of the above

The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will

A

Increase first at fast rate and then slow

B

Increase first at slow rate and then fast

C

Decrease continuously

D

First increase, reach maximum and then decrease

With rise in temperature, the solubility of ammonia in water at a fixed pressure

A

Increases

B

Decreases

C

Remains unchanged

D

Increases exponentially

With rise in pressure, the solubility of gases in solvent, at a fixed temperature

A

Increases

B

Decreases

C

Remains unchanged

D

Decreases linearly

At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to

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