National Science Olympiad Forum By SOF Olympiad Trainer - Page 215

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 10
Yes we are not planting more trees. A should be the correct

Ans 2:

Class : Class 9
shouldn't the no of trees remain the same? it is not mentioned if we are planting more trees

Ans 3:

Class : Class 8
Isn't it C?

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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
a

Ans 2:

Class : Class 10
The answer should be (A) because Urea is an acid and contains high amounts of Hydrogen and Nitrogen. It is also considered as a fertilizer because fertilizer is an acid just like urea and also fertilizer contains high amounts of hydrogen and nitrogen. Fertilizer also allows the maximum plant-growth. So, it should be (A).

Ans 3:

Class : Class 10
As per the activity mentioned in NCERT and my own research, the most appropriate answer should be A, because fertilizers boost plant growth and are nutrient specific, meaning they replenish the nutrients.

Ans 4:

Class : Class 9
should be option d

Ans 5:

Class : Class 8

Ans 6:

Class : Class 10
Fertilizer can be both acidic or basic. Some fertilizers have Urea, Ammonium Nitrate as constituents due to which they are acidic. However salts of Potassium such as Potassium Nitrate and Phosphate are also used that are strong bases.

Ans 7:

Class : Class 8

Ans 8:

Class : Class 10

Ans 9:

Class : Class 8

Ans 10:

Class : Class 8
It should be D as both manure and fertiliser have nutrients

Ans 11:

Class : Class 8
Should it be d??

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Subject :NSO    Class : Class 2

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