If a gas is produced during a chemical reaction, what precaution should be taken while verifying the law of conservation of mass?
Answer and explanation
Correct answer: The reaction should be carried out in a closed container, and the total mass should be measured before and after the reaction.
According to the law of conservation of mass, the total mass remains constant during a chemical reaction. In an open container, a gas produced may escape, so its mass will not be included in the measurement. Therefore, the reaction should be performed in a closed container and the total mass should be measured before and after the reaction. Measuring only the remaining solid is incorrect because the gas is also a product of the reaction.
Frequently asked questions
What is the correct answer to this question?
The reaction should be carried out in a closed container, and the total mass should be measured before and after the reaction.
Why is this the correct answer?
According to the law of conservation of mass, the total mass remains constant during a chemical reaction. In an open container, a gas produced may escape, so its mass will not be included in the measurement. Therefore, the reaction should be performed in a closed container and the total mass should be measured before and after the reaction. Measuring only the remaining solid is incorrect because the gas is also a product of the reaction.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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