class 9th ch 1 science

MATTER IN OUR SURROUNDINGS MCQ

Quiz

 

1. During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water
   leave the body cells by the process of :
   1.   (a) effusion
   2.   (b) osmosis
   3.   (c) diffusion
   4.   (d) plasmolysis
2. Which of the following energy is absorbed during the change of state of a substance ?
   1.   (a) specific heat
   2.   (b) latent heat
   3.   (c) heat capacity
   4.   (d) heat of solution
3. Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air ?
   (i) increase in pressure (ii) increase in temperature
   (iii) decrease in pressure (iv) decrease in temperature
   1.   (a) (i) and (ii)
   2.   (b) (i) and (iii)
   3.   (c) (ii) and (iii)
   4.   (d) (ii) and (iv)
4. On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be :
   1.   (a) 33°C, 56°C and 118°C
   2.   (b) 35°C, 56°C and 119°C
   3.   (c) 35°C, 56°C and 118°C
   4.   (d) 56°, 119°C and 35° C
5. Which of the following are also considered to be the states of matter ?
   (i) Plasma (ii) Platelets (iii) BEC (iv) BHC
   1.   (a) (i) and (ii)
   2.   (b) (ii) and (iii)
   3.   (c) (i) and (iii)
   4.   (d) (ii) and (iv)
6. One of the following does not undergo sublimation. This one is :
   1.   (a) iodine
   2.   (b) sodium chloride
   3.   (c) ammonium chloride
   4.   (d) camphor
7. Which of the following process/processes release heat ?
   (i) condensation (ii) vaporisation (iii) freezing (iv) melting
   1.   (a) only (i)
   2.   (b) only (iv)
   3.   (c) (i) and (iii)
   4.   (d) (ii) and (iv)
8. The boiling point of ethane is, – 88°C. This temperature will be equivalent to
   1.   (a) 285 K
   2.   (b) 288 K
   3.   (c) 185 K
   4.   (d) 361 K
9. If the temperature of an object is 268 K, it will be equivalent to :
   
   1.   (a) – 5°C
   2.   (b) + 5°C
   3.   (c) 368°C
   4.   (d) – 25°C
10. Which of the following statement is incorrect ?
    
    1.   (a) the particles of matter are very, very small
    2.   (b) the particles of matter attract one another
    3.   (c) the particles of some of the matter are moving constantly
    4.   (d) the particles of all the matter have spaces between them
11. Which one of the following statements is not true ?
    
    1.   (a) the molecules in a solid vibrate about a fixed position
    2.   (b) the molecules in a liquid are arranged in a regular pattern
    3.   (c) the molecules in a gas exert negligibly small forces on each other, except during collisions
    4.   (d) the molecules of a gas occupy all the space available
12. 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 :
    1.   (a) air is heavier than bromine
    2.   (b) both air and bromine have the same density
    3.   (c) bromine is heavier than air
    4.   (d) bromine cannot be heavier than air because it is going upwards against gravity
13. A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is :
    1.   (a) krypton
    2.   (b) kerosene
    3.   (c) carbon steel
    4.   (d) carbon dioxide
14. When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the
    whole beaker turns purple on its own, even without stirring. This is an example of :
    1.   (a) distribution
    2.   (b) intrusion
    3.   (c) diffusion
    4.   (d) effusion
15. The evaporation of a liquid occur only at
    1.   a. all temperatures
    2.   b. temperature less than 100oC
    3.   c. fixed temperature
    4.   d. temperature more than 100oC
16. The melting point of a substance is defined as the constant temperature at
    atmospheric pressure when
    1.   a. Both the solid & liquid exist together
    2.   b. The solid starts melting.
    3.   c. The solid is completely changed into liquid.
       c. The solid is completely changed into liquid.
    4.   d. Only liquid is present
17. A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which
    one of the following represents the correct arrangement ?
    1.   (a) water, air, wind
    2.   (b) air, sugar, oil
    3.   (c) oxygen, water, sugar
    4.   (d) salt, juice, air
18. Which of the following have least inter atomic spacing?
    1.   a. solid
    2.   b. plasma
    3.   c. liquid
    4.   d. gases
19. Diethyl ether evaporates faster than ethyl alcohol because of which factor?
    1.   a. Vapour pressure of ether is greater than that of alcohol.
    2.   b. Molar mass of ether is graters than that of ether.
    3.   c. vapour pressure of alcohol is greater than that of ether
    4.   d. Boiling point of ether is higher than that of alcohol.
20. Physical state of water at , and is respectively
    
    1.   a. gas, solid and liquid
    2.   b. solid, gas and liquid
    3.   c. liquid, solid and gas
    4.   d. solid, liquid and gas