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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

Kunal took few iron turnings and mixed them well with sulphur powder. He could separate the iron turnings with the help of a magnet. He heated the mixture for some time and tried to separate the iron turnings with the magnet but he could not. Why?

A On heating, a chemical change takes place and a new compound is formed.
B On heating, iron becomes non-magnetic hence, it is not attracted by magnet.
C On heating, a physical change takes place hence iron and sulphur gets mixed up.
D On heating, iron evaporates and only sulphur is left behind.


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Class : Class 5

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 4

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Class : Class 4
The awnser is D

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

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Class : Class 5

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Class : Class 5
fuckoff

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 8

When we walk on sand our feet sink into it and it is difficult for us to walk but a camel can easily walk on sand because
(i) The weight of the camel is the force that is spread over the large area covered by its feet.
(ii) The pressure exerted by the camel’s body on the sand is very large.

A Only (i) is correct.
B Only (ii) is correct.
C Both (i) and (ii) are correct and (ii) is the conclusion of (i).
D Both (i) and (ii) are correct and (i) is the conclusion of (ii).


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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 1

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