1. In biological method, what is called the tendency to resist changes in the internal environment?

(a) Isobar

(b) Non-partnership

(c) Establishment

(d) symbiosis

ANS. (C) Establishment

2. Which of the following causes more irritation?

(a) boiling water

(b) steam

(c) hot air

(d) Sun rays

ANS. (B) Steam

3. Kidney stone (kidney stones) is mainly made up of which of the following?

(a) sodium chloride

(b) silicate

(c) calcium oxalate

(d) Calcium bicarbonate

ANS. (D) Calcium Bicarbonate

4. Which of the following types of lenses are used to correct osteomatism?

(a) concave lens

(b) convex lens

(c) Bifocal lens

(d) cylindrical

ANS. (D) cylindrical

5. Which is the most abundant inert gas in the Earth's atmosphere?

(a) helium

(b) Neon

(c) Argon

(d) Zenon

ANS. (C) Argon

6. The softest metal is ……….

(a) platinum

(b) silver

(c) iron

(d) gold

ANS. (D) Gold

7. Which of the following gases is used in the manufacture of vegetable ghee from vegetable oil?

(a) Hydrogen

(b) helium

(c) oxygen

(d) nitrogen

ANS. (A) Hydrogen

8. Which layer of the atmosphere is also called ozonosphere?

(a) exosphere

(b) Stratosphere

(c) Troposphere

(d) mesosphere

ANS. (B) Stratosphere

9. Which of the following is responsible for the Taj Mahal becoming yellow?

(a) Potassium

(b) Carbon dioxide

(c) Sulfur dioxide

(d) No option is correct

ANS. (C) Sulfur Dioxide

10. Which lens normally turns the light falling on it inward?

(a) convex

(b) concave

(c) plane concave

(d) cylindrical

ANS. (A) Convex