MCQ
Contrary to other hydrogen halides, hydrogen fluoride is a liquid because
- ASize of $F$ atom is small
- B$HF$ is a weak acid
- ✓$HF$ molecule are hydrogen bonded
- DFluorine is highly reactive
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${R_2}SiC{l_2} + {H_2}O \to (1)\xrightarrow{{polymerisation}}(2)$
Compound $(2)$ in above reaction is
| Catalyst | Process |
| $(i) \;\mathrm{Na}_{2} \mathrm{O}$ | $(a)$ The oxidation of ethyne to ethanal |
| $(ii) \;\mathrm{TiCl}_{4}+ \mathrm{Al(CH_3)}_{3}$ | $(b)$ Polymerisation of alkynes |
|
$(iii)\;\mathrm{PdCl_2} $ |
$(c)$ Oxidation of $SO_2$ in the manufacture of $H_2SO_4$ |
| $(iv)\;$Nickel complexes | $(d)$ Polymerisation of ethylene |
Which of the following is the correct option ?
$C(g) + 4H(g) \to C{H_4}(g),\,\Delta H = - {x_1}\,k\,cal$
$C{H_4}(g) \to C{H_3}(g) + H(g),\,\Delta H = + y\,k\,cal$
The bond energy of $C - H$ bond is