Advertisements
Advertisements
Question
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Advertisements
Solution
- (b) Vaporisation
- (d) Freezing
- (a) Melting
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
Make a list of different types of changes with example.
Write true or false
Burning of sugar is a temporary change.
Write true or false
Burning of paper and formation of curd are reversible changes.
Read the paragraph and note down the various types of changes it mentions.
It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Give reasons why – separation of mixtures e.g. iron from a mixture of iron and sulphur is a physical change, but heating a mixture of iron and sulphur is considered a chemical change.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
Water is known as a universal solvent. Why?
