MCQ
Which pair show cis-trans isomerism
- ✓Maleic-fumaric acid
- BLactic-tartaric acid
- CMalonic-succinic acid
- DCrotonic-acrylic acid

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$2 Cu ^{2+}+4 X ^{-} \rightarrow Cu _2 X _2( s )+ X _2$
$(h = 6.62 \times 10^{-34} \,Js$ and $c = 3.0 \times 10^8 \,ms^{-1})$
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 :