KCET · Chemistry · Some Basic Concepts of Chemistry
Which one of the following has maximum number of atoms of oxygen?
- A \(2 \mathrm{~g}\) of carbon monoxide
- B \(2 \mathrm{~g}\) of carbon dioxide
- C \(2 \mathrm{~g}\) of sulphur dioxide
- D \(2 \mathrm{~g}\) of water
Answer & Solution
Correct Answer
(D) \(2 \mathrm{~g}\) of water
Step-by-step Solution
Detailed explanation
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{CO}\)
\[
=\frac{2}{28} \times 6.022 \times 10^{23} \times 1
\]
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{CO}_{2}\)
\[
=\frac{2}{44} \times 6.022 \times 10^{23} \times 2
\]
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{SO}_{2}\)
\[
=\frac{2}{64} \times 6.022 \times 10^{23} \times 2
\]
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\)
\[
=\frac{2}{18} \times 6.022 \times 10^{23} \times 1
\]
Hence, \(2 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\) has maximum number of atoms of oxyen.
\[
=\frac{2}{28} \times 6.022 \times 10^{23} \times 1
\]
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{CO}_{2}\)
\[
=\frac{2}{44} \times 6.022 \times 10^{23} \times 2
\]
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{SO}_{2}\)
\[
=\frac{2}{64} \times 6.022 \times 10^{23} \times 2
\]
Number of oxygen atom in \(2 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\)
\[
=\frac{2}{18} \times 6.022 \times 10^{23} \times 1
\]
Hence, \(2 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\) has maximum number of atoms of oxyen.
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