A solution in test tube A turns red litmus blue, evolves hudrogen on reaction with Zn and doesnot react with sodium carbonate, whereas solution in test tube B turns blue litmus red, librates hydrogen on reaction with Zn and CO2 with Na2CO3, solution taken in A and B are :
(1 Point)
(a) acid in A, base in B
(b) base in A, acid in B
(c) base in both A and B
(d) acid in both A and B
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