Question

Explain the reason :(a) a teacher took few crystals of sugar in a dry test tube and heated the test tube over flame.The colour of sugar turned black.

Answer 1

Answer:

it turns black because it contains sulphur

Answer 2

Answer:

Explanation:

it is because chemical change  takes place with decomposition of sugar into carbon and water vapour. the water vapour rises and carbon is left which is black in colour.

    C6H12O6  ------heat------>  C   +   H20