MCQ
Among the following metals, the most dense is
- ✓osmium
- Bchromium
- Cplatinum
- Dgold
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$STATEMENT-2$: The higher oxidation states for the group $14$ elements are more stable for the heavier members of the group due to 'inert pair effect'.
$C_2H_4(g) + H_2(g) \to C_2H_6(g)$
| Bond | Bond energy $(kJ)$ |
| $C-H$ | $413$ |
| $C-C$ | $348$ |
| $C=C$ | $610$ |
| $H-H$ | $436$ |
$CH_3CHO + HCN \to CH_3CH(OH)CN \xrightarrow{H-OH} CH_3CH(OH)COOH$
$M{g^{2 + }} + 2{e^ - } \to Mg(s);\,\,E = - 2.37\,V$
$C{u^{2 + }} + 2{e^ - } \to Cu(s);\,\,\,E = + 0.33\,V$
