Question

CHAPTER 5 Separation of substances

1. Husk is separated from heavier seeds of grain

a. winnowing

b. Hand picking

c. sieving

d. None of the above

2. Which of the following properties can affect dissolution of sugar in water?

a. Quantity of Sugar

b. Temperature

c. Type of water

d. Amount of sugar dissolved

3.Which technique is used to purify dirty water?

a. Centrifugation

b. Evaporation

c. Sedimentation

d. Decantation

4. Four mixtures are given below

(i) Kidney beans and chick peas

(ii) Pulses and rice

(iii) Rice flakes and corn

(iv) Potato wafers and biscuits

Which of these can be separated by the method of winnowing?

(a) (i) and (ii)

(b) (ii) and (iii)​

Answer 1

Which class ??????????????

Answer 2

Answer:

1.a)winnowing

2.b)temperature

3.c)sedimentation

4.iii)rice flakes and corn