Subject :NSO Class : Class 8
A few healthy gram seeds are placed in each of the three pots X, Y and Z containing same type of soil. The soil in pot X is mixed with some green leaves. The soil in pot Y is mixed with old cow dung while soil of pot Z is mixed with urea. Pots are watered regularly and given proper environment for plant-growth. Which of the following will be observed after 10 days?
A Lot of growth in Z with replenishment of all the nutrients.
B Lot of growth in X without replenishment of any nutrient.
C Lot of growth in Y with replenishment of the nutrients.
D Both (A) and (C)
Ans 1:
Class : Class 8
Ans 2:
Class : Class 8
should be option d
Ans 3:
Class : Class 8
a
Ans 4:
Class : Class 8
Ans 5:
Class : Class 9
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 6:
Class : Class 9
Ans 7:
Class : Class 9
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 8:
Class : Class 9
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 9:
Class : Class 8
It should be D as both manure and fertiliser have nutrients