MHT CET 2024 15th May Morning Shift | Heat and Thermodynamics Question 21 | Physics

Four moles of hydrogen, two moles of helium and one mole of water vapour form an ideal gas mixture. $\left[C_{\mathrm{v}}\right.$ for hydrogen $=\frac{5}{2} R, C_v$ for helium $=\frac{3}{2} R, \quad C_{\mathrm{v}}$ for water vapour $\left.=3 \mathrm{R}\right]$ What is the molar specific heat at constant pressure of the mixture?

$\frac{11}{3} \mathrm{R}$

$\frac{23}{7} R$

$\frac{16}{7} R$

$\frac{23}{3} R$

MHT CET 2024 15th May Morning Shift

MCQ (Single Correct Answer)

-0

A sheet of steel is 40 cm long and 5 cm broad at $0^{\circ} \mathrm{C}$. The surface area of the sheet increases by $1.4 \mathrm{~cm}^2$ at $100^{\circ} \mathrm{C}$. Coefficient of linear expansion of steel is

$1.9 \times 10^{-5} /{ }^{\circ} \mathrm{C}$

$2.4 \times 10^{-5} /^{\circ} \mathrm{C}$

$3.5 \times 10^{-5} /^{\circ} \mathrm{C}$

$7 \times 10^{-5} / \mathrm{C}$

MHT CET 2024 15th May Morning Shift

MCQ (Single Correct Answer)

-0

A quantity of heat ' $Q$ ' is supplied to monoatomic ideal gas which expands at constant pressure. The fraction of heat converted into work is $\left[\gamma=\frac{\mathrm{C}_{\mathrm{p}}}{\mathrm{C}_{\mathrm{v}}}=\frac{5}{3}\right]$

$3: 5$

$5: 3$

$2: 5$

$3: 2$

MHT CET 2024 11th May Evening Shift

MCQ (Single Correct Answer)

-0

What is the pressure of hydrogen in a cylinder of volume 10 litre if its total energy of translation is $7.5 \times 10^3 \mathrm{~J}$ ?

$5 \times 10^5 \mathrm{Nm}^{-2}$

$10^6 \mathrm{Nm}^{-2}$

$0.5 \times 10^5 \mathrm{Nm}^{-2}$

$5 \times 10^6 \mathrm{Nm}^{-2}$

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