MCQ
Which of the following group elements show variable valency?
- AAlkali metals
- BNoble gases
- ✓Transition metals
- DAlkaline earth metals
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Comment on optical activity of the products
Reason : $1-$ Butene is more stable than $2-$ butene According to Saytzeff's rule, $2-$ butene should be the product which is more branched or substituted compound and hence, more stable than butene $-1$