How many of the following elements can react with dilute sulphuric acid?

Na, Al, K, Au, Fe, Ag, Cu

Q. How many of the following elements can react with dilute sulphuric acid?
Ca, Mg, K, Au, Fe, Ag, Cu


(a) 2
(b) 3
(c) 4
(d) 5

Q. How many elements from the following can react with hydrochloric acid?
Na, Mg, K, Al, Zn, Ca, Ag, Pt, Cu.

Q. How many of the following metals is extracted by self reduction process?
$Pb,Au,Mg,Sn,Fe,Al,Ag,Hg,Na,Zn,Cu,Ca$

Q. Of the following, the element that does NOT react with dilute hydrochloric acid to produce hydrogen gas is _______.

Q. Why does Cu not liberate H2 on reacting with dilute sulphuric acid?