1.

(A) : The rate of a chemical reaction decreases as the reaction proceeds. (R) : The reactant concentration remains constant as the reaction proceeds. The correct answer is

Answer»

Both (A) and (R) are TRUE, (R) explains proprly (A)
Both (A) and (R) are true, (R) does not EXPLAIN (A)
(A) is true (R) is FALSE.
(A) is false (R) is true.

Answer :B


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