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Physics · 2020
JEE Main · 7 January 2020, Shift 1 · Q7
Two moles of an ideal gas with (C_P)/(C_V)=5/3 are mixed with 3 moles of another ideal gas with (C_P)/(C_V)=4/3. The value of (C_P)/(C_V) for the…
Two moles of an ideal gas with $\displaystyle \frac{\mathrm{C}_{\mathrm{P}}}{\mathrm{C}_{\mathrm{V}}}=\frac{5}{3}$ are mixed with $\displaystyle 3$ moles of another ideal gas with $\displaystyle \frac{\mathrm{C}_{\mathrm{P}}}{\mathrm{C}_V}=\frac{4}{3}$. The value of $\displaystyle \frac{\mathrm{C}_{\mathrm{P}}}{\mathrm{C}_{\mathrm{V}}}$ for the mixture is :
Official answer
(4)
$\displaystyle 1.42$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.