Question

2 ml of sodium hydroxide solution added to a few pieces of granulated zinc metal taken in a tent tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing Write the equation of the chemical reaction involved and the test to detect the gas Name the gas which will be evolved wben the same metal reacts with dilute solution of strong acid. OR The pll of a salt to make Laty and crispy pakoras is I4. ldentiry the salt and write a chemical equation for its lonmation List its two uses, IP.T.O

Answer 1

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Here's your answer

When sodium hydroxide reacts with granulated zinc it produces sodium zincate + hydrogen gas

Reaction is as follows:-

2NaOh+Zn----->(Heating) Na2ZnO2+H2

When the gas that is hydrogen is bubbled through soap solution and matchstick is put in front of it then it will make a Pop sound and blow off.

Now, Let strong acid be HCl

Then Hydrochloric acid when reacted with Zinc metal will give zinc chloride + hydrogen gas

The reaction is followed :-

HCl + Zn ---->ZnCl2 + H2

Or

pH of salt is 14

So the salt must be Sodium Hydogen Carbonate

NaHCO3

REACTION :-

NaCl + H2O + NH3 + CO2 --------> NH4Cl + NaHCO3

Sodium Hydrogencarbonate

Answer 2

Explanation:

When sodium hydroxide reacts with granulated zinc it produces sodium zincate + hydrogen gas

Reaction is as follows:-

2NaOh+Zn----->(Heating) Na2ZnO2+H2

When the gas that is hydrogen is bubbled through soap solution and matchstick is put in front of it then it will make a Pop sound and blow off.

Now, Let strong acid be HCl

Then Hydrochloric acid when reacted with Zinc metal will give zinc chloride + hydrogen gas

The reaction is followed :-

HCl + Zn ---->ZnCl2 + H2

Or

pH of salt is 14

So the salt must be Sodium Hydogen Carbonate

NaHCO3

REACTION :-

NaCl + H2O + NH3 + CO2 --------> NH4Cl + NaHCO3

Sodium Hydrogencarbonate

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