Question

Complete and balance the following chemical equations :
(t) CaCO3 + HO —a
(ii) Al + HCI
(iii) Mn02 + HO —a


CBSE Class X Science SA 2 (3 Marks)

Answer 1

(i) CaCO3(s) + 2HCl(aq)— CaCl2(s) +H20 (l) + CO2(g) 

(ii) 2A1(s) + 6HCI(aq) ____ 2A1C13(aq). 3H2(g)

(iii) MnO2+ 4HCl(aq) —> MnCl2 + 2H20(l) + Cl2(g)