Law of conservation of mass states that
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33%
new mass is created when old one is destroyed during a chemical reaction
47%
mass can neither be created nor destroyed in a chemical reaction
14%
mass is changed from one form to another
7%
none of these
Name the Indian philosopher who told that" the smallest indivisible particles of matter " as parmanu
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17%
Pakudha katyayama
47%
Maharishi kanad
31%
Aryabhatt
5%
Democritus
Balanced forces are defined as :
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If two or more forces cancel each other
24%
If two or more forces do not cancel each other
27%
Both a and b
6%
None
When we stretch a rubber band this is example of-
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73%
Change shape of the object by force
9%
Stop motion by the force
14%
Change direction of motion by force
4%
None
What is force ?
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84%
A push or a pull on the body
9%
Movement of the body
4%
A body is at rest
3%
None
When a batsman hits the cricket ball, this is an example of:
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55%
Change direction of motion by force
4%
Stop motion by the force
17%
Change speed by the force
23%
Both a and c
Magnet force is defined as :
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80%
Attraction iron - object
11%
Attraction of plastic object
4%
Attraction of wood object
6%
None
Gravitational force is -
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Pulling any object
6%
Pushing any object
69%
Force applied by earth on an object in downward direction
3%
None
Balanced forces can:
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Cause motion and stop motion
31%
Change speed and change direction of motion
19%
Change shape of objects
19%
None
Unbalanced forces can -
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23%
Cause motion and stop motion
42%
Change speed and change direction of motion.
8%
Change shape of objects
27%
All options
Generally on heating, temperature of substances_____________ ?
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76%
Increases
16%
Decreases
7%
Remain same
1%
None of these
Different substances have ___________ melting points.
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12%
Same
69%
Different
17%
Both a and b
2%
None of these