Advertisements
Advertisements
प्रश्न
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
पर्याय
physical
chemical
Advertisements
उत्तर
A change in which matter undergoes a change but the total mass of the substance is unaltered is a physical change.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
What are man-made changes ?
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
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.
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.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
In a solution of salt in water, water is the solute
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Give two examples for the following case:
Physical changes which are reversible
