Question

Oxygen is collected in the jar by downward displacement of water.

• A. True
• B. False

Answer 1

The correct option is A True

• Oxygen gets collected in the jar by the downward displacement of water.
• As oxygen keeps collecting in the gas jar, the water level in the jar keeps on decreasing and the empty space above the water gets filled with oxygen.
• When all the water has been displaced, the gas jar is full of oxygen.
• Cover the jar with a greased lid and remove it from the water.

$2{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)\stackrel{{\mathrm{MnO}}_2}{\to }2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\uparrow$

Hence, the given statement is true.