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From the following reactions predict the correct order about acid strength.

HC ≡ CH + LiNH2 NH3 + HC ≡ CLi

NH3 + R  NH2-+ RH

a. RH < NH3 < HC ≡ CH 

b. RH > NH3 > CH ≡ CH

c. RH > NH3 < HC ≡ CH 

d. RH < NH3 > HC ≡ CH

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Correct option  (A)


From 1st equation HC ≡ CH is more acidic than NH3 

From 2nd equation, NH3 is more acidic than RH 

(Acid being produced is weaker than the one that produces it) 

Acidic strength HC ≡ CH > NH3 > RH or RH < NH3 < HC≡ CH

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