Question

A certain amount of oxygen is prepared by the thermal decomposition of potassium chlorate and is collected by downward displacement of water. The pressure of the gas collected is measured with the help of a manometer. The pressure recorded is found to be more than the pressure recorded for the same volume of oxygen cylinder containing same amount of oxygen under the same conditions.
How do you account for this deviation?

• A. Due to the formation of $C{l}_2$ gas during decomposition.
• B. Due to the presence of water vapour along with oxygen.
• C. The temperature of oxygen liberated is relatively high.
• D. All the above

Answer 1

The correct option is B Due to the presence of water vapour along with oxygen.

The deviation occurs due to the presence of water vapour along with oxygen.