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Question : 8
Total: 12
During the reaction of some metals with dilute hydrochloric acid, the following observations were made by a student :
(a) Silver does not show any change.
(b) Some bubbles of a gas are seen"when lead is reacted with the acid.
(c) The reaction of sodium is found to be highly explosive.
(d) The temperature of the reaction mixture rises when aluminium is added to the acid.
Explain these observations giving appropriate reason.
(a) Silver does not show any change.
(b) Some bubbles of a gas are seen"when lead is reacted with the acid.
(c) The reaction of sodium is found to be highly explosive.
(d) The temperature of the reaction mixture rises when aluminium is added to the acid.
Explain these observations giving appropriate reason.
Solution:
(a) Silver is covered with a thin layer of silver chloride, so it does not react with dilute hydrochloric acid.
→ No Reaction
(b) Bubbles of hydrogen gas are evolved when lead is reacted with the acid.
+
→
+
(c) The reaction of sodium is found to be highly explosive because sodium is very reactive in nature.
2
+
→
+
(d) The temperature of the reaction mixture rises when aluminium is added to the acid because the reaction is highly exothermic in nature.
+
→
+
(c) The reaction of sodium is found to be highly explosive because sodium is very reactive in nature.
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