A:-Bicarbonates of Na and K
B:-Bicarbonates of Ca and Mg
C:-Chlorides and sulphates of Ca and Mg
D:-Chlorides and sulphates of Na and K
Correct Answer:- Option-C
Question39:-Role of a catalyst in a chemical reaction is
A:-To decrease activation energy
B:-To increase activation energy
C:-To increase heat of reaction
D:-To decrease heat of reaction
Correct Answer:- Option-A
Question40:-Characteristics of trans....
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