MCQ
Which of the following contains maximum number of atoms
- A$6.023 \times {10^{21}}$ molecules of $C{O_2}$
- ✓$22.4 \,L$ of $C{O_2}$ at $STP$
- C$0.44 \,g$ of $C{O_2}$
- DNone of these
No. of atoms $ = 3 \times 6.023 \times {10^{21}}$=$18.069 \times {10^{21}}$ atoms
(b) $22.4\,L$ of $C{O_2}$
No. of atoms =$6.023 \times {10^{23}} \times 3$$ = 18.069 \times {10^{23}}$ atoms
(c) $0.44\,gm$ of $C{O_2}$
No. of moles $ = \frac{{0.44}}{{44}} = \frac{1}{{100}} \times 6.023 \times {10^{23}}$ moles
$= 6.023 \times {10^{21}}$ moles $ = 3 \times 6.023 \times {10^{21}}$ atoms $18.069 \times {10^{21}}$ atoms
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$(I)\,C{H_3}O\mathop C\limits^ \oplus {H_2}$ is more stable than $C{H_3}\mathop C\limits^ \oplus {H_2}$
$(II)\,M{e_2}\mathop C\limits^ \oplus H$ is more stable than $C{H_3}C{H_2}\mathop C\limits^ \oplus {H_2}$
$(III)\,C{H_2} = CH - \mathop C\limits^ \oplus {H_2}$ is more stable than $C{H_3}C{H_2}\mathop C\limits^ \oplus {H_2}$
$(IV)\,C{H_2} = \mathop C\limits^ \oplus H$ is more stable than $C{H_3}\mathop C\limits^ \oplus {H_2}$
$NO_{(g)} + \frac{1}{2}{O_2} \rightleftharpoons N{O_2}_{(g)}$
$2N{O_2}_{(g)} \rightleftharpoons 2NO_{(g)} + {O_2}_{(g)}$