MCQ
Product $(A)$ is


- A$trans-2 -$ butane
- ✓$cis-2 -$ butene
- C$1 -$ butene
- DIso- butene


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$(I)$ $\phi -CH_3$
$(II)$ $\phi -CH_2-CH_3$
$(III)$ $\phi -CH(CH_3)_2$
$(IV)$ $\phi-C(CH_3)_3$
towards electrophilic substitution will be - [where $\phi =C_6H_5$]
Assertion $(A) :$ Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason $(R)$ $:$ It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below :