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Q 12.12     Arrange the following compounds in increasing order of their property as indicated: 

         (ii)     CH_{3}CH_{2}CH(Br)COOH, CH_{3}CH(Br)CH_{2}COOH, (CH_{3})_{2}CHCOOH ,CH_{3}CH_{2}CH_{2}COOH (acid strength)

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increasing order of their acidic strength-

\\(CH_{3})_{2}CHCOOH<CH_{3}CH_{2}CH_{2}COOH<CH_{3}CH(Br)CH_{2}COOH<CH_{3}CH_{2}CH(Br)COOH

Due to presence of  Bromine, which shows -I effect and we know that -I grows weaker as distance increases. And in case of n-propyl and isopropyl, the +I effect is more in isopropyl, so it is weak in acidic strength.
-I\propto acidic nature
+I\propto 1/ acidic

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manish

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