WBJEE · Chemistry · States of Matter
At \(273 \mathrm{~K}\) temperature and \(76 \mathrm{~cm~} \mathrm{Hg}\) pressure, the density of a gas is \(1.964 \mathrm{~g} \mathrm{~L}^{-1} .\) The gas is
- A \(\mathrm{CH}_{4}\)
- B \(\mathrm{CO}\)
- C \(\mathrm{He}\)
- D \(\mathrm{CO}_{2}\)
Answer & Solution
Correct Answer
(D) \(\mathrm{CO}_{2}\)
Step-by-step Solution
Detailed explanation
Hint: Molar mass of gas \((\mathrm{M})=\frac{\mathrm{dRT}}{\mathrm{P}}=\frac{1.964 \times 0.0821 \times 273}{1}\) \(=44 \mathrm{~g}\) Hence, the gas is \(\mathrm{CO}_{2}\)
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