MCQ
Which of the following is an example of freon ?
- ✓$ \mathrm{CCl}_2 \mathrm{~F}_2 $
- B$ \mathrm{CCl}_4 $
- C$ \mathrm{CHCl}_2 $
- D$ \mathrm{CH}_2 \mathrm{Cl}$
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$\Delta_{\text {vap }} \mathrm{H}-\Delta_{\text {vap }} \mathrm{U}=...... \times 10^{2} \,\mathrm{~J}\, \mathrm{~mol}^{-1}$. (Round off to the NearestInteger)
$\left[\right.$ Use : $\left.R=8.31\, \mathrm{~J}\, \mathrm{~mol}^{-1}\, \mathrm{~K}^{-1}\right]$
[Assume volume of $\mathrm{H}_{2} \mathrm{O}(\mathrm{l})$ is much smaller than volume of $\mathrm{H}_{2} \mathrm{O}(\mathrm{g})$. Assume $\mathrm{H}_{2} \mathrm{O}(\mathrm{g})$ treated as an ideal gas]
$I.$ monosubstituted alkene
$II.$ disubstituted alkene
$III.$ trisubstituted alkene
Which of the following statement(s) is(are) correct ?
$(A)$ $0.01 \,M\, HCl$
$(B)$ $0.01 \,M \,NaOH$
$(C)$ $0.01 \,M \,CH _{3} COONa$
$(D)$ $0.01 \,M \,NaCl$