Name: 
 

Matter and Our Surroundings


Multiple Response
Identify one or more choices that best complete the statement or answer the question.
 

 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
 

 2. 
Emily 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.
High temperature, high pressure
 d.
Low temperature, high pressure
 

 3. 
The property of flow is unique to fluids. Which one of the following statements is correct?
 a.
Only liquids are fluids
 b.
Gases and liquids behave like fluids
 c.
Gases and solids behave like fluids
 d.
Only gases behave like fluids
 

 4. 
During summer, water kept in an earthen pot becomes cool because of the phenomenon of
 a.
osmosis
 b.
diffusion
 c.
evaporation
 d.
transpiration
 

 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.
Salt, juice, air
 b.
Oxygen, water, sugar
 c.
Air, sugar, oil
 d.
Water, air, wind
 

 6. 
Question 6.
On converting 25°C, 38°C and 66°C to Kevlin scale, the correct sequence of temperature will be.
 a.
298 K, 300 K and 338 K
 b.
273 K, 278 K and 543 K
 c.
298 K, 310 K and 338 K
 d.
298 K, 311 K and 339 K
 

 7. 
Choose the correct statement from the following:
 a.
Conversion of solid into liquid is called sublimation.
 b.
Conversion of vapour into solid without passing through the liquid state is called vapourisation.
 c.
Conversion of vapour into solid without passing through the liquid state is called freezing.
 d.
Conversion of solid into vapour without passing through the liquid state is called sublimation
 

 8. 
The boiling points of  (three organic liquids) 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.
308 K, 329 K and 391 K
 b.
306 K, 329 K and 391 K
 c.
308 K, 329 K and 392 K
 d.
308 K, 329 K and 391 K
 

 9. 
Which condition out of the following will increase the evaporation of water?
 a.
Decrease in temperature of water
 b.
Less exposed surface area of water
 c.
 Increase in temperature of water
 d.
Adding common salt to water
 

 10. 
Dry ice is
 a.
CO2 in liquid state
 b.
water in gaseous state
 c.
water in solid state
 d.
CO2 in solid state
 

 11. 
Which of the following conditions is most favourable for converting a gas into a liquid?
 a.
Low pressure, low temperature
 b.
High pressure, low temperature
 c.
Low pressure, high temperature
 d.
High pressure, high temperature
 

 12. 
Which of the following has the strongest interparticle forces at room temperature?
 a.
Iron
 b.
Bromine
 c.
Oxygen
 d.
Water
 



 
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