Read the following statements carefully and identify P, Q and R respectively
1) P reacts vigorously with cold water
2) Q reacts with boiling water
3) R reacts with steam
a) Cu , Zn , Na
b) Zn , Cu , Na
c)Na , Mg , Cu
d)Na ,Zn ,Fe
Answer is c). Na reacts violently with cold water, Mg reacts with boiled water and Cu reacts with steam.