Answer:
(a)
Silver is a very less reactive metal. Thus, it does not react with dilute HCl.
(1)
(b)
The reaction of Al with dilute HCl is exothermic i.e., heat is produced in the reaction,
hence the temperature of the reaction mixture rises. (1)
(c)
Sodium is a very reactive metal. It reacts vigorously with the evolution of
heat too. (1)
(d)
Bubbles are seen due to the evolution of O2 gas.
(1)
(e)
gas is
produced whenreacts with
dilute HCl.
(1)
Or
(a)
Combination reaction (when two or more reactants combine to form single
product)
(1)
(b)
Thermal decomposition reaction (when a reactant decomposes into two or more substances
by heating)
(1)
(c)
Double displacement reaction (when two compounds exchange their ions to form
two new compounds)
(1)
(d)
Neutralization reaction (when an acid reacts with a base to form salt and
water.)
(1)
(e)
Redox reaction (when oxidation and reduction take place simultaneously)
(1)
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