NEET Physics - MCQ Practice Questions

In a cyclic process, the change in internal energy is:

The standard molar entropy of a substance at 0 K according to the third law of thermodynamics is:

A gas expands isothermally from volume V₁ to V₂. The work done by the gas is W and heat absorbed is Q. What is the relationship between W and Q for an ideal gas?

A reversible heat engine operates between two reservoirs at temperatures T₁ = 400 K and T₂ = 300 K. What is the maximum possible efficiency of this engine?

For a triatomic linear gas molecule, what is the value of Cp - Cv?

A 2 kg block of ice at 0°C is heated until it completely melts. The latent heat of fusion of ice is 3.36 × 10⁵ J/kg. What is the heat required?

An ideal gas at pressure P₁ and volume V₁ undergoes heating at constant volume until pressure becomes P₂. If P₂/P₁ = 2, what is the ratio of final to initial temperature?

When 1000 J of heat is supplied to a system and it does 400 J of work, what is the change in internal energy?

For a spontaneous reaction at 25°C, which condition must be satisfied?

An isolated system undergoes an irreversible process. What happens to its total entropy?

A microscope has an objective of focal length 2 cm, eyepiece of focal length 4 cm and the tube length of 40 cm. If the distance of distinct vision of eye is 25 cm, the magnification in the microscope is

Let $a_1,a_2,a_3,\dots$ be a G.P. of increasing positive terms. If $a_1{a}_5=28$ and $a_2+a_4=29$, then $a_6$ is equal to: