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प्रश्न
Fill in the blank.
The reaction in which energy is evolved is called
उत्तर
The reaction in which energy is evolved is called exothermic reaction.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Melting of butter in a pan
State whether the following is physical or chemical changes.
burning of sugar —
True or false
Dissolving of a solid in liquid is a physical change.
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
Grinding of wheat grain changes its size. It is a ____________ change.
