Akash Mourya posted an Question
August 21, 2020 • 15:28 pm 30 points
  • IIT JAM
  • Chemistry (CY)

Ochemiw chemistry (basic concepts in organic chemistry and sereo durncle arrange the following in decreasing order of their pk ch,-ch-cooh (i) ch-chcooh no nr c

ochemiw Chemistry (Basic Concepts in Organic Chemistry and Sereo durncle Arrange the following in decreasing order of their pk CH,-CH-COOH (i) CH-CHcoOH NO NR CH,-CH-COOH (iv) CH-CH-CoOH CH, CN HCOOH (V)

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    Priyanshu kumar

    Hope this will helps u😊

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    but bro question hai decreasing order of there pka tho jiska pka bada hai wo pehle aana chahiye aur jiska sabse chota pka hai wo last me aana chahiye

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    yes akash...more is the acidity less is the pka value...In the attached image there is acidity order and pka value get reverse of it

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    ha tho 2nd wale ka pka sabse kam hai kyuki uski acidity sabse jyada hai tho 2nd wala last me aana chahiye kyuki decreasing order of pka bola hai

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    yes Akash arrange this in pka value...2nd is most acidic it has least pka value among them...so it comes last when arrange in decreasing order of pka value..attached image me acidity ka order dikhaya gya hai akash..pka iske reverse hoga

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    dear akash don't be confuse... acidity order is 2>1>4>5>3 so pka order 3>5>4>1>2

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    Priyanshu kumar Best Answer

    check this👇

    cropped5576372726289203045.jpg
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    In III there is electron releasing alkyl group(+I effect) which decreases the acidity...so it is least acidic

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    -I effect increases the acidity...and -I effect of NR3+>NO2>CN

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    II is most acidic as there is NR3+ group (-I effect)

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    So overall acidity order 2>1>4>5>3

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    more the acidity less is the pka value...So pka value reverse of the acidity order..

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    please ask if any doubt in this😊🙏

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