How many elements among given form 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

From how many alkyl halide we get pentane on reaction with Zn + HCl (only structural isomers)

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

Among K,Ca,Fe and Zn the element which can form more than one binary compound with chlorine is

Amongest the following elements, how many occurs in the earth's crust in the native state ? Au,Pt,Hg,Zn,Fe .

How many metals are commercially extracted by hydrometallurgy from the given metals : Ag, Mn, In, Cr,Pb,Au .