List of top Chemistry Questions on Mole concept and Molar Masses asked in CUET (PG)

When 3 moles of gas A is mixed with 1 mole of gas B at room temperature and 1 atm pressure, the entropy of mixing is
(Given log 3=0.4771,
log 4 = 0.6020)

Calculate the number of moles of carbon mono oxide in the following reaction
CH₃CH₂CHO $\stackrel{hv}{→}$ CH₃CH₃ + CO
If the light irradiated has λ= 3020 A°, the quantum yield of reaction 0.54 and the light energy absorbed is 15000 erg in a given time.