MCQ
Which compound shows cis-trans isomerism
- A$1-$butene
- B$2-$propene
- ✓$2-$butene
- DBenzene
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$(A)\,\,CH_3CH_2CH_2Br + KOH \rightarrow CH_3CH CH_2 + KBr + H_2O$


$(A)$ The $pH$ of $1 \times 10^{-8}\,M\,HCl$ solution is $8$.
$(B)$ The conjugate base $H _2 PO _4^{-}$is $HPO _4{ }^{2-}$.
$(C)$ $K _{ w }$ increases with increase in temperature.
$(D)$ When a solution of weak monoprotic acid is titrated against a strong base at half neutralisation point, $pH =\frac{1}{2} pK _{ a }$
Choose the correct answer from the option given below.