How many elements among given from dihydrogen on reaction with HCl:
Cu, Na, K, Ag, Au, Zn, Ca, Mg

How many of these metals can displace H_(2) easily from acids. Fe, Mg, Al, Cu, Ag, Au, Zn

How many of these metals carbon reduction is used during their extraction. Ag, Au, Fe, Sn, Zn, Pb, Al

How many of following elements will liberate H_2 gas when treated with dil HNO_3 ? Mg, Zn, Sn, Pb

How many of the following metals can be extracted by auto - reduction ? Fe, Zn, Pb, Al, Hg, Cu, K, Ca

Which of the following sets of elements delays flowering if their concentration in plants is low? (a) N, K, Mg , S (b) N , S, P (c) Ca, Mg , Cu (d) N, S, Mo

The elements given below are arranged in order of increasing atomic masses. F, Na, Mg, Al, Si, P, S, Cl, Ar, K This arrangement of elements is an illustrator of which law of classification of elements.

The elements given below are arranged in order of increasing atomic masses. F, Na, Mg, Al, Si, P, S, Cl, Ar, K Pick two sets of elements which shows similar behaviour

Elements which show unique nature in the preparation of hydrogen are Na, K, Li Mg, Ca, Ba Al, Zn, Pb Fe, Cu, Ag

How many of the following elements show +2 as their most stable oxidation state ? Sc, Sn, Zn, Be, Pb, Co, Ag, Ti, Fe

From the following flowsheet for the extraction of pure metal, answer the given questions. (iv) Some of the following metals are obtained by electrolysis of their fused salts : Al, Na, Cu, Ag, Mg, Ca . These metals are :