1. Pasteurisation is related to

2. Which of the following is not correctly matched?

3. Phosphatase test is used for the analysis of 

4. For a given liquid, the rate of evaporation depends on
I. the temperature of the liquid
II. the temperature of air
III. the surface area of the liquid

Select the correct factor/factors using the codes given below.

5. Consider the following statements.

Assertion (A) The temperature below is obtained due to a mixture of salt and ice.
Reason (R) Salt increases the freezing point of ice. IAS (Pre) 1993, UP Lower Sub (Pre) 1998

6. Solutions are of many types. Consider the following types of solution with an example each.

Assam PCS (Pre) 2024
I. Gas in liquid - Vinegar
II. Solid in liquid - Brine
III. Solid in solid - Brass
IV. Liquid in Liquid - Coca-cola

Select the correctly matched pairs using the codes given below:

7. Consider the below two statements.
Statement I Lyophilic sols are more stable than lyophobic sols.
Statement II Lyophilic colloids are extensively solvated.
From the above statements, choose the correct answer from the options given below.

8.With the progress of any chemical reaction, the rate of the chemical reaction ...... with time.

9. Bleaching action of chlorine is by 

10. Assertion (A) A chemical reaction becomes faster at higher temperatures.
Reason (R) At higher temperatures, molecular motion becomes more rapid.

Codes

11. Match List I (oxidation number) with List II (the element) and select the correct answer using the codes given below the lists

12.Which of the following slows down the reaction rate?

13. Which one of the following actions is related with evaporation of sweat?

14. A reaction is spontaneous, when 

15. Example of corrosion is

A. black coating on silver
B. green coating on copper
C. brown coating on iron
D. above three
E. None of these