Question

what are the gases liberated and when dilute hydrochloric acid reacts with 1.zinc and 2.zinc carbonate suggest the experiment to identify these gases
dry hydrogen chloride gas does not exhibit acidic property why​

Answer 1

Answer:

Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.

Dry HCl gas does not release H+ ions and hence, the acidic property of gas is not imparted

Answer 2

Answer:

1) Hydrogen

2) Hydrogen and Carbon dioxide

Experiment:

• Bring a burning match stick near the mouth of the test tube
• Also pass the gas through lime water Ca(OH)2.

• Take a wet blue litmus and red litmus paper and bring it into the contact of HCl gas.

Observations:

• When the march stick is brought near the test tube , we can hear a pop sound . This indicates it is Hydrogen gas.
• On passing the gas through the lime water , the lime water becomes milky . This shows the presence of Co2

• The wet blue litmus remains blue , whereas the red turns into blue. This indicates that HCl gas in Basic.

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