| S.R. NO |
Questions |
Answers |
| 1 |
The change of water into the vapour is called – |
Physical |
| 2 |
What is an example of chemical change– |
Softening of vegetables when cooked |
| 3 |
What form of energy is produced in the decomposition of water? |
Heat |
| 4 |
Pasteurization is related to – |
Sterilization of milk |
| 5 |
Because of impurities the boiling point of a liquid – |
Increases |
| 6 |
Milk is an example of – |
An emulsion |
| 7 |
Which type of colloidal system is expressed in the fog – |
Liquid in a gas |
| 8 |
If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half a litre of water, which of the following physical quantities will not change? |
Volume |
| 9 |
After cutting the cucumber if salt is added, then water comes out due to – |
Osmosis |
| 10 |
The technique of chromatography is used to – |
Separate the substances from a mixture |
| 11 |
The process of solid camphor into camphor vapour is called – |
Sublimation |
| 12 |
A sample of any of the following substances disappears after some time when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called – |
Sublimation |
| 13 |
A mixture of sand and naphthalene can be separated by – |
Sublimation |
