Questions and Answers
What happens when quicklime is added to water?
Quicklime reacts with water to form slaked lime and produces heat and hissing sound.
What is the basic difference between a physical change and a chemical change?
In physical change, substances undergo a change in state, whereas in a chemical change, substances undergo a change in composition.
Why is the volume of gas collected over one electrode double that of gas collected over the other electrode in electrolysis of water?
Because water contains hydrogen and oxygen in the ratio of 2:1.
What type of reaction occurs when white silver chloride is exposed to sunlight?
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What is the product formed when quicklime reacts with water?
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What is the difference between the arrows ↑ and ↓ in a chemical equation?
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What is the ratio of hydrogen to oxygen in water?
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What is the product of the reaction between sodium chloride and silver nitrate?
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What is the difference between the physical change and chemical change?
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