General Science #28 Multiple Choice Questions

GENERAL SCIENCE #28

MULTIPLE CHOICE QUESTIONS

General Science : Multiple Choice Questions (MCQ) : Assam Jobs Guide

1. Which of the following phenomena would increase on raising the temperature?

(a) Diffusion, evaporation, compression of gases

(b) Evaporation, compression of gases, solubility

(c) Evaporation, diffusion, expansion of gases

(d) Evaporation, solubility, diffusion, compression of gases

Answer: (c)

2. Nandita visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.

(a) Low temperature, low pressure

(b) High temperature, low pressure

(c) Low temperature, high pressure

(d) High temperature, high pressure

Answer: (c)

3. The property of flow is unique to fluids. Which one of the following statements is correct?

(a) Only gases behave like fluids

(b) Gases and solids behave like fluids

(c) Gases and liquids behave like fluids

(d) Only liquids are fluids

Answer: (c)

4. During summer, water kept in an earthen pot becomes cool because of the phenomenon of which of the following?

(a) Diffusion

(b) Transpiration

(c) Osmosis

(d) Evaporation

Answer: (d)

5. A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?

(a) Water, air, wind

(b) Air, sugar, oil

(c) Oxygen, water, sugar

(d) Salt, juice, air

Answer: (c)

6. Which of the following will be the correct sequence of temperature on converting 25°C, 38°C and 66°C to Kelvin scale?

(a) 298 K, 311 K and 339 K

(b) 298 K, 300 K and 338 K

(c) 273 K, 278 K and 543 K

(d) 298 K, 310 K and 338 K

Answer: (a)

7. Which of the following statement is correct?

(a) Conversion of solid into vapour without passing through the liquid state is called vaporisation.

(b) Conversion of vapour into solid without passing through the liquid state is called sublimation.

(c) Conversion of vapour into solid without passing through the liquid state is called freezing.

(d) Conversion of solid into liquid is called sublimation.

Answer: (b)

8. The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?

(a) 306 K, 329 K and 391 K

(b) 308 K, 329 K and 392 K

(c) 308 K, 329 K and 391 K

(d) 329 K, 392 K and 308 K

Answer: (c)

9. Which of the following conditions will increase the evaporation of water?

(a) Increase in temperature of water

(b) Decrease in temperature of water

(c) Less exposed surface area of water

(d) Adding common salt to water

Answer: (a)

10. What is the boiling point of water at sea level?

 (a) 0°C

(b) 273 K

(c) 373 K

(d) 273°C

Answer: (c)

11. Which of the following has the strongest interparticle forces at room temperature?

(a) Oxygen

(b) Water

(c) Bromine

(d) Iron

Answer: (d)

12. Which of the following conditions is most favourable for converting a gas into a liquid?

(a) High pressure, low temperature

(b) Low pressure, low temperature

(c) Low pressure, high temperature

(d) High pressure, high temperature

Answer: (a)

13. Dry ice is ……………

(a) water in solid state

(b) water in gaseous state

(c) CO2 in liquid state

(d) CO2 in solid state

Answer: (d)

14. What is called the phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point?

(a) Evaporation

(b) Diffusion

(c) Transpiration

(d) Osmosis

Answer: (a)

15. When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment  ……………

(a) air is heavier than bromine

(b) both air and bromine have the same density

(c) bromine is heavier than air

(d) bromine cannot be heavier than air because it is going upwards against gravity

Answer: (c)

16. Which one of the following statements is not true?

(a) The molecules in a solid vibrate about a fixed position

(b) The molecules in a liquid are arranged in a regular pattern

(c) The molecules in a gas exert negligibly small forces on each other, except during collisions

(d) The molecules of a gas occupy all the space available

Answer: (b)

17. What is the correct procedure of heating iron-sulphur mixture to prepare iron sulphide?

(a) Heat the powder mixture at the base of the test tube using a blue flame throughout

(b) Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout

(c) Heat the powder mixture at the top of the test tube using an orange flame throughout

(d) Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout

Answer: (a)

18. Which of the following cannot be considered a form of matter?

(a) Atom

(b) Water

(c) Humidity

(d) Electron

Answer: (c)

19. Which of the following causes the temperature of a substance to remain constant while it is undergoing a change in its state?

(a) Latent heat

(b) Lattice energy

(c) Loss of heat

(d) None of the above

Answer: (a)

20. Which of the following statement is not true regarding the characteristic of matter?

(a) Particles of a matter are randomly moving in all directions

(b) Kinetic energy of the particles increases with a rise in temperature

(c) Kinetic energy of the particles of all maters remains the same at a particular temperature

(d) Particles of matter diffuse into each other on their own

Answer: (c)

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