MCQ
In the reaction $BC{l_3} + P{H_3}\, \to \,C{l_3}B - P{H_3},$ Lewis base is
- A$BC{l_3}$
- ✓$P{H_3}$
- C$C{l_3}B - P{H_3}$
- DNone of these
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Assertion $(A)$: Cis form of alkene is found to be more polar than the trans form
Reason $(R)$: Dipole moment of trans isomer of $2$-butene is zero.
In the light of the above statements, choose the correct answer from the options given below :