Page 214 - Class 9th Chemistry Objective Questions and Answers
Click Here for Hindi Medium
Chapter – Matter around us
1. As air pressure decreases, so does the boiling point of a liquid.
(A) increases
(B) decreases
(C) remains constant
(D) None of these
Answer :- (B) decreases
2. The transformation of gas into liquid is called.
(A) Gasification
(B) Sublimation
(C) condensation
(D)Jamna
Answer :- (C) Condensation
3. The temperature at which solid changes into liquid is called:
(A) liquid point
(B) boiling point
(C) Critical temperature
(D) critical point
Answer :- (A) Liquid point
4. The force that binds the particles of matter together is called.
(A) intermolecular space
(B) bond
(C) Intermolecular forces
(D) Nuclear force
Answer :- (C) Intermolecular forces
5. The process by which the smell of perfume spreads all around in the air is called:
(A) evaporation
(B) Diffusion
(C) condensation
(D) Liquefaction
Answer :- (B) Diffusion
6. Which of the following is a fundamental property of matter?
(A) Mass and volume
(B) Temperature and pressure
(C) Density and compressibility
(D) all
Answer :- (A) Mass and volume
7. The categories of matter are:
(A) very subtle
(B) having kinetic energy
(C) attract each other
(D) All of these
Answer :- (D) All of these
8. How many states of matter are there?
(A) three
(B) four
(C) five
(D) six
Answer :- (C) Five
9. Which of the following is not a property of a substance?
(A) density
(B) Compressibility
(C) wave patience
(D) diffusion
Answer :- (C) wave patience
10. Whose compressibility is the greatest?
(A) solid
(B) liquid
(C) Gas
(D) Plasma
Answer :- (A) Solid
11. Which of the following has the highest density?
(A) solid
(B) liquid
(C) Gas
(D) Plasma
Answer :- (A) Solid
12.The direct transformation of a solid substance into vapor is called:
(A) evaporation
(B) Boiling
(C) condensation
(D) Sublimation
Answer :- (D) Sublimation
13. Produced by the process of evaporation:
(A) heat
(B) coolness
(C) increase in temperature
(D) None of these
Answer :- B) Coldness
14. The value of 100 degree Celsius in Kelvin is:
(A) 200.15
(B) 373.15
(C) 473.15
(D) 573.15
Answer :- (B) 373.15
15. The temperature of a substance in Kelvin is 673.158 Celsius, the value of this temperature will be in Centigrade:
(A) 373.75
(B) 273.15
(C) 473.15
(D) 400
Answer :- (D) 400
16. The reason for the origin of plasma state in the solar system is.
(A) low temperature
(B) high pressure
(C) high temperature
(D) None of these
Answer :- (C) High temperature
17. Volume of gas when heated
(A) increases
(B) decreases
(C) remains unchanged
(D) None of these
Answer :- (A) increases
18. Wet clothes dry in humid air:
(A) late
(B) as soon as possible
(C) Due to humidity
(D) Due to cold
Answer :- (A) late
19. Rate of evaporation of liquid in airy places
(A) decreases
(B) increases
(C) remains unchanged
(D) None of these
Answer :- (B) increases
20. Which of the following is not correct
(A) Matter is made of microscopic particles
(B) The particles of matter remain in constant motion
(C) The density of solid matter is greater than that of liquid.
(D) Compressibility of solid matter is more than that of liquid.
Answer :- (D) Compressibility of solid substance is more than that of liquid.
21. On increasing the temperature of any solid substance:
(A) can turn into liquid
(B) Can go directly into gas state without changing into liquid
(C) may remain unchanged
(D) All of the above
Answer :- (D) All of the above
22. Which of the following is sublimated?
(A) Sulfur
(B) Iodine
(C) Magnesium
(D) Bromine
Answer :- (B) Iodine
23.Which of the following is a substance?
(A) cold
(B) smell
(C) love
(D) cold drinks
Answer :- (D) cold drink
24. Which of the following is not a substance?
(A) air
(B) Water
(C) affection
(D) food
Answer :- (C) Affection
25. In which state is the energy of molecules maximum?
(A) solid
(B) liquid
(C) Gas
(D) None
Answer :- (C) Gas
26. In which state is the energy of molecules the lowest?
(A) solid
(B) liquid
(C) Gas
(D) None
Answer :- (A) Solid
27. What is uncertain in liquid?
(A) density
(B) size
(C) Volume
(D) mass
Answer :- (B) Size
28. A piece of ice remains floating on the surface of water because
(A) Ice is heavier than water
(B) Ice and water have the same density
(C) Ice is lighter than water
(D) The density of ice is greater than that of water.
Answer :- (C) Ice is lighter than water.
29. What is dry ice?
(A) dried piece of ice
(B) Solid carbon dioxide
(C) Solid carbon disulphide
(D) solid alcohol
Answer :- (B) Solid carbon dioxide
30. Which of the following is not a liquid?
(A) water
(B) Mercury
(C) air
(D) Iron
Answer :- (D) Iron
