Question:
Sodium and potassium are stored in kerosene.
Answer:
Sodium and potassium are stored in kerosene because they are
highly reactive elements. They can easily catch fire even when in
contact with air.
Q 5.
One day Reeta went to a jeweller's shop with her mother. Her
mother gave an old gold jewellery to the goldsmith to polish. Next
day when they brought the jewellery back, they found that there was
a slight loss in its weight. Can you suggest a reason for the loss in
weight?