Write the correct order of acidity:

P > Q > R > S

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Q > P > R > S

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Q > R > S > P

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S > R > Q > P

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Solution

The correct option is A $Q > R > S > P$
Due to $H^{+}$ lossing tendency acidic strength differs.
In case of malonic acid there is one carbon atom between the two carboxyl group. As the -I effect decreases so the stability of carbanion and so the acidic strength.Similary in the case of succsinic acid.

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\begin{matrix} Column -I & Column -II (a) N H_{4} C l & (P) Hydrogen bond (b) C u S O_{4} .5 H_{2} O & (Q) Co-ordinate bond (c) H N C & (R) Ionic bond (d) L i q u i d H_{2} O_{2} & (S) Covalent bond \end{matrix}

\begin{matrix} Column -I & Column -II (a) N H_{4} C l & (P) Hydrogen bond (b) C u S O_{4} .5 H_{2} O & (Q) Coordinate bond (c) H N C & (R) Ionic bond (d) L i q u i d H_{2} O_{2} & (S) Covalent bond \end{matrix}

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