MHT CET 2026 17th April Morning Shift | Heat and Thermodynamics Question 46 | Physics

The heat energy that must be supplied to 14 g of nitrogen at room temperature to raise its temperature by $48\ ^\circ\text{C}$ at constant pressure is ($R$ = gas constant, Molecular weight of nitrogen $(\text{N}_2)$ = 28)

$72\ R$

$84\ R$

$96\ R$

$108\ R$

MHT CET 2026 17th April Morning Shift

MCQ (Single Correct Answer)

-0

The speeds of the seven molecules are 1, 3, 5, 7, 2, 4 and 6 km/s respectively. The ratio of their r.m.s. velocity and average velocity will be

$2\sqrt{5} : 1$

$\sqrt{5} : 1$

$1 : 2\sqrt{5}$

$\sqrt{5} : 2$

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

A black body has maximum wavelength ' $\lambda_{\mathrm{m}}$ ' at temperature 2000 K . Its maximum wavelength at 3000 K will be

$\frac{3}{2} \lambda_{\mathrm{m}}$

$\frac{16}{81} \lambda_m$

$\frac{81}{16} \lambda_m$

$\frac{2}{3} \lambda_m$

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

The relation between efficiency $(\eta)$ of Carnot engine and coefficient of performance $\left(\eta_1\right)$ of refrigerator is

$\eta=\frac{1}{1+\eta_1}$

$\eta=\frac{1}{1-\eta_1}$

$\quad \eta=\frac{\eta_1}{1-\eta_1}$

$\eta=\frac{1+\eta_1}{\eta_1}$

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Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

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