Matter in our Surrounding test paper-1
Matter in our surrounding test Paper-2
Matter in Our Surrounding test paper-3
Question 1 ( 1.0 marks)State whether True or False.(i) Water has no definite shape; therefore, it is not matter.(ii) Gases expand to fill the space available.Solution: (i) False(ii) Tru e
Question 2 ( 1.0 marks)
A substance has a definite volume, but no definite shape. State whether this substance is solid, liquid or gas.
Solution:Liquid
Question 3 ( 1.0 marks)
Which physical state of matter is the densest?
Solution: Solid
Question 4 ( 2.0 marks)
What are the different factors affecting evaporation?
Solution:Different factors affecting evaporation:
(i) Surface area
(ii) Temperature
(iii) Wind speed
(iv) Humidity
Question 5 ( 2.0 marks)
It is observed that water boils at lower temperature at higher altitudes. Why?
Solution: Atmospheric pressure is much less at higher altitudes. So, less thermal energy is required to get the vapour pressure equal to the atmospheric pressure. Hence, water boils at lower temperature at higher altitudes.
Question 6 If some alcohol is rubbed on the hand, the rubbed portion of the hand feels cool. Why?
Solution:Alcohol is a volatile liquid. It evaporates at room temperature. When it is rubbed on the hand, it draws heat from the skin and evaporates into the surroundings. As a result, the rubbed portion of the hand feels cool.
For more questions and answer Visit
http://jsuniltutorial.weebly.com/ix-matter-in-our-surrounding.html
Matter in our surrounding test Paper-2
Matter in Our Surrounding test paper-3
Question 1 ( 1.0 marks)State whether True or False.(i) Water has no definite shape; therefore, it is not matter.(ii) Gases expand to fill the space available.Solution: (i) False(ii) Tru e
Question 2 ( 1.0 marks)
A substance has a definite volume, but no definite shape. State whether this substance is solid, liquid or gas.
Solution:Liquid
Question 3 ( 1.0 marks)
Which physical state of matter is the densest?
Solution: Solid
Question 4 ( 2.0 marks)
What are the different factors affecting evaporation?
Solution:Different factors affecting evaporation:
(i) Surface area
(ii) Temperature
(iii) Wind speed
(iv) Humidity
Question 5 ( 2.0 marks)
It is observed that water boils at lower temperature at higher altitudes. Why?
Solution: Atmospheric pressure is much less at higher altitudes. So, less thermal energy is required to get the vapour pressure equal to the atmospheric pressure. Hence, water boils at lower temperature at higher altitudes.
Question 6 If some alcohol is rubbed on the hand, the rubbed portion of the hand feels cool. Why?
Solution:Alcohol is a volatile liquid. It evaporates at room temperature. When it is rubbed on the hand, it draws heat from the skin and evaporates into the surroundings. As a result, the rubbed portion of the hand feels cool.
For more questions and answer Visit
http://jsuniltutorial.weebly.com/ix-matter-in-our-surrounding.html
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