Chemistry
Grade-8
Easy
Question
Arrange the following metals in the increasing order of the number of hydrogen molecules liberated when 1 molecule/atom of the metal reacts with water/ steam.
(i). Fe
(ii). Ca
(iii). Al
(iv). Na
- (iv) (ii) (i) (iii)
- (iv) (ii) (iii) (i)
- (ii) (iii) (i) (iv)
- (iii) (iv) (i) (ii)
Hint:
reactivity series
The correct answer is: (iv) (ii) (i) (iii)
by looking at their reactivity and the charges of the ion of the elements we found that Na, Ca, Fe, Al is the sequence.
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