Question

Why temperature above 200 celcius is not preferred for the laboratory preparation of hydrogen chloride gas.

A) It will slow down the reaction

B) It will take longer time for the releasing of hydrogen chloride gas.

C) It will form crust of sodium sulphate which will break the round bottomed flask.

D) None of the above.

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Answer 1

Answer:

C) It will form crust of sodium sulphate which will break the round bottomed flask.

Answer 2

Answer:

the lower temperature is preferred because a higher temperature causes sodium sulphate to form a hard crust, which sticks to the bottom of the flask, and is difficult to remove.