Metals and Non-...

Metal $A + \$ Salt solution of $B\rightarrow$ Salt solution of  $A + \$ Metal $B$
Which one is more reactive among $A$ and $B$?

Metals low in activity series are very:

Non-metals are never used in cooking utensils because:

Which of the following will replace hydrogen from acids to form salts?
$Cu, Hg, Na, Ag$

Out of sulphur and gold, which will be have a higher melting point?

Electrolysis is used for oxides of highly reactive metals that are above:

Cinnabar is heated in air which converts it into:

In a solution of lead acetate, a strip of metal Z was dipped. After some time, lead from the solution was deposited at the metal strip. Which is more reactive?

Zinc oxide is reduced to zinc metal by heating with:

If $A, B, C, D, E, F, G, H, I, J, K$ represent metals in the decreasing order of their reactivity, which one of item is most likely to displace all of the metals given?