MCQ
Which mixture forms a buffer when dissolved in $1\, lit$. of water
- A$0.2\, mol\, NaOH$ and $0.2\, mol\, HBr$
- B$0.2\, mol\, NaCl$ and $0.3\, mol\, HCl$
- ✓$0.4\, mol\, HNO_2$ and $0.2\, mol\, NaOH$
- D$0.5\, mol\, NH_3$ and $0.5\, mol\, HCl$
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$C_2H_4(g) + H_2(g) \to C_2H_6(g)$
.......$kJ$
| Bond | Bond energy $(kJ)$ |
| $C-H$ |
$413$ |
| $C-C$ | $348$ |
| $C=C$ | $610$ |
| $H-H$ | $436$ |
Reason : $sp$ hybridised carbon atoms of acetylene are considerably electronegative.