User Forum

Subject :NSO    Class : Class 8

A student performed the first set of experiments with four test tubes containing solutions and metal pieces as indicated in the figure. In the second set of experiments, the metal pieces are interchanged between test tubes P and Q and also between test tubes R and S.

In which test tube(s), no reaction will occur in both sets of experiments?

A P and Q
D R and S.

answer is R

Ans 1:

Class : Class 8

Ans 2:

Class : Class 4

Post Your Answer