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Subject :NSO    Class : Class 9

Four students were given small pieces of materials P, Q, R and S respectively. They observed the reactions of these materials as follows :

According to them, materials P, Q, R and S respectively are

AFe, Cu, Na, P
BNa, Fe, P, Cu
CP, Fe, Na, Cu
DCu, P, Na, Fe

Ans 1:

Class : Class 8

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