Law of conservation of mass I — task. Chemistry CBSE Live product, Class 9.

Choose the best answer:

A student heats \(10 g \)of sugar in a test tube. After heating, only \(4 g\) of black residue (carbon) remains. The student thinks \(6 g\) of mass is lost. How would you explain this using the law of conservation of mass?

The black residue absorbed the rest of the sugar
The law doesn’t apply to sugar
Some sugar remained unreacted
The lost mass turned into gases that escaped

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4. Law of conservation of mass I

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