Which one of the following is most reactive?
a) lithium
b) sodium
c) potassium
d) all of these
Lithium when burns in the presence of oxygen, it gives……flame.
a) red
b) bright yellow
c) little color
d) no color
Sodium when burns in the presence of oxygen, it gives……flame.
a) red
b) bright yellow
c) little color
d) no color
Potassium when burns in the presence of oxygen, it gives……flame.
a) red
b) bright yellow
c) little color
d) no color
Lithium floats on water and reacts quickly to produce lithium oxide and …….gas.
a) oxygen
b) water gas
c) hydrogen
d) nitrogen
Sodium floats on water and reacts very quickly to produce sodium oxide and ….gas.
a) oxygen
b) water gas
c) hydrogen
d) nitrogen
