Matter in our surroundings class 9th

Q1. Early Indian philosophers classified matters in the form of..

• A.Three basic elements

• B.Two basic elements

• C.Five basic elements

• D.None of these

Q2. Which of the following phenomena would increase on raising the temperature?

• A. Evaporation, compression of gases, solubility

• B. Diffusion, evaporation, compression of gases

• C. Evaporation, diffusion, expansion of gases

• D. Evaporation, solubility, diffusion, compression of gases

Q3. Which of the following conditions is most favourable for converting a gas into a liquid?

• A. High temperature and low pressure

• B. Low temperature and high pressure

• C. High temperature and high pressure

• D. Low temperature and low pressure

Q4. Under which of the following conditions we can boil water at room temperature?

• A. Hight temperature and high pressure

• B. Low temperature and high pressure

• C. High temperature and low pressure

• D. Low temperature and low pressure

Q5. Kinetic energy of molecules is directly proportional to

• A. Pressure

• B. Atmospheric pressure

• C. Temperature

• All of these

Q6. Dry ice is-

• A. Water in gaseous state

• B.Water in solid state

• C. CO2 in solid state

• D. CO2 in liquid state

Q7. 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. Air, sugar, oil

• B. Water, air, wind

• C. Salt, juice, air

• D. Oxygen, water, sugar

Q8. When Heat Is Constantly Supplied By A Gas Burner With Small Flame To Melt Ice, Then The Temperature Of Ice During Melting:

• A. Increases very slowly

• B. Does not increase at all

• C. First remains constant and then increases

• D. Increases to form liquid water

Q9. During summer, water kept in an earthen pot becomes cool because of the phenomenon of

• A. transpiration

• B. diffusion

• C. evaporation

• D. Osmosis

Q10. Which of the following has the strongest interparticle forces at room temperature?

• A. Iron

• B. Oxygen

• C. Bromine

• D. Water