MCQ
Which of following acid remains unaffected on heating ?
- Amalonic acid
- Bmaleic acid
- ✓Fumaric acid
- DSuccinic acid

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Assume $100 \%$ ionization for both $NaCl$ and $MgCl _2$
Given : $K _{ b }\left( H _2 O \right)=0.52\,K\,kg\,mol ^{-1}$
Molar mass of $NaCl$ and $MgCl _2$ is 58.5 and $95\,g$ $mol ^{-1}$ respectively.