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Subject :NSO    Class : Class 5

Some iron nails were stored in containers for a few weeks as shown in the diagram below.

Only the nails in bottle X rusted. What will be a suitable conclusion for the given experiment?

A Rusting requires water only.
B Rusting requires air only.
C Rusting requires both water and air.
D Rusting requires neither air nor water.


Ans 1:

Class : Class 5
As only nails in bottle X got rusted,this means both water and airare required for rusting (as bottle X is fulfilling both the conditions) bottle W has only air, bottle Y has only water and bottle Z has oil.i.e., neither air nor water

Ans 2:

Class : Class 6
Then how is Mars(Planet) rusted?

Ans 3:

Class : Class 7
C is the answer to this question

Ans 4:

Class : Class 6

Ans 5:

Class : Class 5

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