MCQ
Which show maximum valency
- ✓Phosphorus
- BTin
- CAntimony
- DBismuth
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Which of the following reactants will complete the above reaction ?
$(A)$ Total number of valence shell electrons at metal centre in $Fe ( CO )_5$ or $Ni ( CO )_4$ is $16$
$(B)$ These are predominantly low spin in nature
$(C)$ Metal-carbon bond strengthens when the oxidation state of the metal is lowered
$(D)$ The carbonyl $C - O$ bond weakens when the oxidation state of the metal is increased
To obtain high yields of $CH_3Cl$, the ratio of $CH_4$ to $Cl_2$ must be

