NEET First Law of Thermodynamics Practice Questions With Solutions

NEET Chemistry First Law of Thermodynamics Practice Questions

Question 1.

Choose the correct statement for the work done in the expansion and heat absorbed or released when 5 liters of an ideal gas at 10 atmospheric pressure isothermally expands into a vacuum until the volume is 15 liters:

ABoth the heat and work done will be greater than zero.

BHeat absorbed will be less than zero and work done will be positive.

CWork done will be zero and heat absorbed or evolved will also be zero.

DWork done will be greater than zero and heat absorbed will remain zero.

Question 2.

The work done during reversible isothermal expansion of one mole of hydrogen gas at 25°C from a pressure of 20 atmosphere to a pressure of 10 atmosphere is :
(Given R = 2.0 cal K ^–1 mol ^–1 )

A–413.14 calories

B413.14 calories

C100 calories

D0 calorie

Question 3.

The work done when 1 mole of gas expands reversibly and isothermally from a pressure of 5 atm to 1 atm at 300 K is: (Given log 5 = 0.6989 and R = 8.314 J K^-1 mol^-1)

Azero J

B150 J

C+4014.6 J

D-4014.6 J

Question 4.

One mole of an ideal gas at 300 K is expanded isothermally from 1 L to 10 L volume. \(\Delta U\) for this process is:
(Use R = 8.314 J K ^–1 mol ^–1 )

A1260 J

B2520 J

C5040 J

D0 J

Question 5.

What is the amount of work done by an ideal gas, if the gas expands isothermally from \(10^{-3}~m^3\) to \(10^{-2}~m^3\) at \(300~K\)against a constant pressure of \(10^{5}~Nm^{-2}\)?

A\(+270 ~kJ\)

B\(–900 ~J\)

C\(+900 ~kJ\)

D\(–900~ kJ\)

Question 6.

A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5atm from an initial volume of 2.50 L to a final volume of 4.50L. The change in internal energy U of the gas in joules will be:

A–500J

B–505J

C–506J

D–508J

Question 7.

Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be:

A3 Joules

B9 Joules

CZero

DInfinite

Question 8.

The work done during the expansion of a gas from a volume of 4 dm³ to 6 dm³ against a constant external pressure of 3 atm is:

A–608 J

B+304 J

C–304 J

D–6.00 J

Question 9.

The molar heat capacity of water at constant pressure, C, is 75 JK^–1 mol^–1. When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of the water is:

A1.2 K

B2.4 K

C4.8 K

D6.6 K

Question 10.

In a closed insulated container a liquid is stirred with a paddle to increase the temperature. The correct option regarding this among the following is:

A∆E = W ≠ 0, q = 0

B∆E = W = q ≠ 0

C∆E = 0, W = q ≠ 0

DW = 0 , ∆E = q ≠ 0

Question 1.

When 1 mol gas is heated at constant volume, the temperature is raised from 298 to 308 K. Heat supplied to the gas is 500 J. The correct statement among the following is:

Aq = w = 500 J, ∆U = 0

Bq = ∆U = 500 J, w = 0

Cq =0, w = 500 J, ∆U = 0

D∆U = 0, q = w = – 500 J

Question 2.

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The ∆E for this process is:
(R = 2 cal.

m o l^{- 1} K^{- 1}

)

A1381.1 cal.

BZero

C163.7 cal.

D9 lit. atm

NEET First Law of Thermodynamics Practice Questions With Solutions

NEET Chemistry First Law of Thermodynamics Practice Questions

Question 1.

Question 2.

Question 3.

Question 4.

Question 5.

Question 6.

Question 7.

Question 8.

Question 9.

Question 10.

Question 1.

Question 2.

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