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Question
Sand and naphthalene balls were heated together in a china dish. The substance left in the china dish after heating will be:
Sand and naphthalene balls were heated together in a china dish. The substance left in the china dish after heating will be:
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Solution
The correct option is C only sand
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.
Hence, option C is correct.
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.
Hence, option C is correct.
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