1.Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). 

Assertion (A) A solution of table salt in a glass of water is homogeneous.
Reason (R) A solution having different compositions throughout is homogeneous.
Select the correct options given below.

2. Given below are two statements. 

Statement I Rusting of Iron is a chemical change. Statement II The process of depositing a layer of zinc on iron is called galvanisation.

In the light of the above statements, choose the most appropriate answer from the options given below:

3.Milk is an example of

4. Which of these is not a colloid? 

5. Indicate which of the following is a pure substance?

1. Iron
2. Gasoline
3. Cow's milk
4. Sea water

Codes

6. A mixture of sand and naphthalene can be separated by

A. sublimation
B. distillation
C. chromatography
D. fractional distillation
E. None of these / More than one of these

7. The conversion of a solid directly into gas is called as

A. sublimation
B. condensation
C. evaporation
D. boiling
E. None of these/More than one of these

8. Process of solid camphor into camphor vapour is called

9. A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called

10. Consider the following statements. 

1. During the process of osmosis, the solvent travels from the concentrated solution to the dilute solution.

In the reverse osmosis, external pressure is applied to the dilute solution.
Which of the statements given above is/are correct?

11. After cutting cucumber if salt is added, then water comes out due to

12. Water passes from the soil into the roots by a physical process called 
 

A. diffusion
B. transpiration
C. absorption
D. osmosis
E. None of these/More than one of these

13. Which one of the following process is not useful for purification of solid?

14. Consider the following pairs.
I. Ginning: Separation of cotton fibres from seeds
II. Weaving : Making yarn from fibres
III. Polyester : Melts on catching fire and sticks to the body
How many of the above pairs are correctly matched?

 

A. Only one pair
B. Only two pairs
C. All three pairs
D. None of the pairs
E. Question not attempted

15. Pasteurisation is a process by which