IIT-JEE
Exam
The regent(s) used for softening the temporary hardness of water is (are)
(A) 3 42 Ca (PO ) (B) ( )2 Ca OH
(C) 2 3 Na CO (D) NaOCl
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IIT-JEE Other Question
The synthesis of 3–octyne is achieved by adding a bromolkane into a mixture of sodium amide and an
alkyne. The bromoalkane and alkyne respectively are
(A) 2 2 2 2 3 BrCH CH CH CH CH and 3 2 CH CH C ≡ CH (B) 2 2 3 BrCH CH CH and 3 2 2 CH CH CH C ≡ CH
(C) 2 2 2 2 3 BrCH CH CH CH CH and 3 CH C ≡ CH (D) 2 2 2 3 BrCH CH CH CH and 3 2 CH CH C ≡ CH .
Among the following, the intensive property is (properties are)
(A) molar conductivity (B) electromotive force
(C) resistance (D) heat capacity