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(i) In the following schematic diagram f...

(i) In the following schematic diagram for the preparation of hydrogen gas as shown in figure , what would happen if following changes are made ?
(a) In place of zinc granules , same amount of zinc dust is taken in the test tube .
(b) Instead of dilute sulphuric acid , dilute hydrochloric acid is taken .
(c) Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated .
(ii) How do metal carbonates and metal hydrogencarbonates react with acids ?

Text Solution

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(i) (a) Hydrogen gas will evolve with greater speed.
(b) Almost same amount of gas is evolved.
(c) If sodium hydroxide is taken, hydrogen gas will be evolved .
`Zn +2NaOH rarrunderset("Sodium zincate")(Na_2ZnO_2)+H_2`
(ii) All metal carbonates and hydrogencarbonates react with acids to form a corresponding salt, carbon dioxide and water .
Metal carbonate + Acid `rarr` Salt + Carbon dioxide + Water
Metal hydrogencarbonate + Acid `rarr` Salt + Carbon dioxide + Water
For example , sodium carbonate reacts with dilute hydrochloric acid as follows :
`Na_(2)CO_(3)(s)+2HCl(aq) rarr2NaCl(aq)+H_(2)O(l)+CO_2(g)`
Sodium hydrogencarbonate reacts with dilute hydrochloric acid as follows :
`NaHCO_(3) (s) + HCl(aq) rarr NaCl(aq)+H_(2)O(l)+CO_(2)(g)`
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