1. Which of the following is an example of a single cell that can change its shape?

(a) Amoeba

(b) Pogliana

(c) Parametium

(d) Yeast

ANS. (A) Amoeba

2. Which of the following has the most energy?

(a) red light

(b) blue (indigo) light

(c) orange light

(d) yellow light

ANS. (B) Blue (Indigo) Light

3. Lubricants are substances that are ........

(a) increasing friction

(b) reducing friction

(c) have no effect on friction

(d) No option is correct.

ANS. (B) Reducing friction

4. What is the chemical name of Hara Thotha (vitriol)?

(a) ferrous sulfate

(b) ferric oxide

(c) ferric phosphate

(d) ferric hydroxide

ANS. (A) Ferrous Sulphate

5. When the carbon dioxide is flowed into lime water, what composition makes it milky?

(a) Calcium sulfate

(b) Calcium carbonate

(c) Calcium bicarbonate

(d) Calcium oxide

ANS. (B) Calcium carbonate

6. Which is not an organic acid?

(a) nitric acid

(b) acetic acid

(c) Malic acid

(d) citric acid

ANS. (A) Nitric acid

7. Which of the following is a 'dynamic living entity' full of life and vitality?

(a) Desert

(b) Forest

(c) environment

(d) water

ANS. (B) Forests

8. Acid rain refers to precipitation with pH (pH).

(a) less than 5

(b) Between 5 and 5.5

(c) more than 7

(d) equal to 7

ANS. (A) less than 5

9. Which colored light shows maximum deviation when passed through a prism?

(a) violet

(b) red

(c) green

(d) yellow

ANS. (A) Violet

10. Due to which ray of sun, solar cooker is hot?

(a) Ultra Violet

(b) infrared

(c) infra violet

(d) No option is correct.

ANS. (B) infrared