Test on Heat & Thermodynamics (Class 11th Physics)

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Question 1

Consider the cyclic process ABCA on a sample of 2.0 mol of an ideal gas as shown in fig. The temperature of the gas at A. and B. are 300K and 500K respectively. A total of 1200 J heat is with drawn from the sample in the process. Find the work done by the gas in part BC. Take R = 8.3 J/mol –K

• A–3000 J
• B+3000 J
• C–4520 J
• D+4500 J

Question 2

The heat energy given to a system in isothermal process is used in –

• AIncreasing the internal energy
• BIncreasing temperature and doing external work
• CDoing external work only
• DIncreasing internal energy, increasing temperature and doing external work

Question 3

For a given mass of a gas, the P-V graph for isothermal variations at temperatures T₁ and T₂ (kelvin) are shown in figure. Then,

• AT₂ = T₁
• BT₁ > T₂
• CT₁ < T₂
• DInformation is incomplete to decide about temperatures

Question 4

During an adiabatic change for monatomic gas the relation between pressure of a gas and temperature T is P ∝ T^x where x is –

• A
• B
• C
• D

Question 5

A system changes from the state (P₁, V₁) to (P₂, V₂) as shown in the figure below. What is the work done by the system –

• A7.5 × 10⁵ joule
• B7.5 × 10⁴ erg
• C12 × 10⁵ joule
• D16 × 10⁵ joule

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