Please select a subject first
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Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
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Match the examples of changes in List I with the correct type of change in List II.
| List I | List II |
| 1. Burning of paper | A: Physical change |
| 2. The ringing of an electric bell | B: Chemical change |
| 3. Curdling of milk | |
| 4. Electric light is switched on | |
| 5. Melting of butter |
Concept: undefined >> undefined
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Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Concept: undefined >> undefined
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Concept: undefined >> undefined
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Concept: undefined >> undefined
Name the following.
A form of energy required for a chemical change.
Concept: undefined >> undefined
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
Concept: undefined >> undefined
Define of intermolecular force of attraction.
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What are the three states of matter ? Define each of them with two examples.
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State the main postulates of kinetic theory of matter.
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What happens to water if it is kept in a deep freezer.
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Name the smallest particle from which matter is made up.
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Give one difference between atoms and molecules.
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What is the relation between intermolecular space and intermolecular force ?
Concept: undefined >> undefined
