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प्रश्न
The following question is pertaining to the laboratory preparation of hydrogen chloride gas.
Write the equation for its preparation mentioning the condition required.
उत्तर
\[\ce{NaCl + H2SO4 ->[<200^{\circ}C] NaHSO4 + HCl ^}\]
Although it is a reversible reaction, it goes to completion as hydrogen chloride continuously escapes as a gas. The reaction can occur up to the stage of the formation of sodium sulphate on heating above 200°C.
\[\ce{NaHSO4 + NaCl ->[above 200^{\circ}C] Na2SO4 + HCl ^}\]
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संबंधित प्रश्न
When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky.
When NH4OH solution is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH4OH solution.
Name the following:
Gas obtained by treating metals with hydrochloric acid.
Name the drying agent used to dry HCl gas.
How is the gas collected and why?
Describe an experiment to prove the following:
HCI gas is heavier than air.
How can you prove that hydrochloric acid contain :
Chlorine?
Give reason for the following:
Dilute hydrochloric acid cannot be concentrated by distilling (boiling) the dilute acid.
What property of hydrogen chloride is demonstrated when it is collected by downward delivery (Upward displacement)?
State the following:
The drying agent used in the laboratory preparation of HCl gas.
Identify the terms for the following:
A method used to collect HCl gas.
