Occurrence Of Metals:-
Metals occurs in nature either in……………..
a) free state
b) combined state
c) both a & b
d) none of these
A metal is said to occur native or free when it is found in nature in metallic state e.g……….
a) silver
b) gold
c) platinum
d) all of these
Gold, silver and platinum are un-reactive and are not affected by …………..
a) air
b) water
c) both a & b
d) none of these
………is a reactive metals.
a) sodium
b) gold
c) silver
d) platinum
…………Na, Ca and K are chemically reactive and are affected by………..
a) air
b) water
c) other chemical reagents
d) all of these
