Question

Section-A

1)Tincture of iodine has antiseptic properties.This solution is made by dissolving: (1)

a)Iodine in potassium iodide. B) Iodine in Vaseline

c) Iodine in water. D) Iodine in alcohol

2)The chemical symbol for Sodium is: (1)

a)Ni. B)Na

c)No. d)Sd

In the following questions two statements are given :one labelled assertion and other labelled reason.

select the correct answer for ab,c,d as given below:

a)Both A and R are true and R is correct explanation of assertion.

b) Both A and R are true but are is not correct explanation of assertion.

C) A is true but R is false.

d) A is false but R is true.

3)Assertion (A): milk and starch solution will show tyndall effect.

Reason ®:because this both contain colloidal particles which cannot be seen with naked eye but big

enough to scatter a beam of light (1)

4)Assertion (A):The size of an atom is very small.

Reason: Atoms of most elements do not exist independently.(1)

Section-B

5)Show diagramatically the separation of mixtures by sublimation.(3)

6)Write applications of centrifugation..(3)

7) Define a solution.Give an example of gas :1)Gas in liquid solution 2)Gas in solution.(3)

8)Name the technique to separate.(3)​

Answer 1

Answer:

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