Question

Sand and naphthalene balls are heated together in a china dish.what substance will be left in the china dish after heating?why

Answer 1

naphthalene ball left in china dish after heating

Answer 2

Hello :-)

When mixture of sand and naphthalene is heated, naphthalene undergoes sublimation and hence is converted to gas and collected by a cotton ball.

Thus the residue left is sand only.

Hope helps :-)