National Science Olympiad Forum By SOF Olympiad Trainer - Page 168
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Raghav Mittal from DAV Public School, ludhiana
Subject :NSO    Class : Class 8

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ritvik bihari from Vibgyor High School, pune
Subject :NSO    Class : Class 7

Ans 1:

PALAK SINGH from ST. PAUL'S SR. SEC. SCHOOL, PALI
Class : Class 7
C

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Sarthak Mittal from G.P. International School, Bharatpur
Subject :NSO    Class : Class 9

Ans 1:

Aarav Rawat from Harvest International, Bangalore
Class : Class 3

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Prasanna Hegde from Vibgyor High Horomavu, BENGALURU
Subject :NSO    Class : Class 3

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Ayush Aryan from Modern public school , North West Delhi
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:

sankalp from Gyan Bharti School, Saket, Delhi
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 2:

sankalp from Gyan Bharti School, Saket, Delhi
Class : Class 9

Ans 3:

sankalp from Gyan Bharti School, Saket, Delhi
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 4:

Nimish shah from Chrysalis high , Banglore
Class : Class 8
a

Ans 5:

Nimish shah from Chrysalis high , Banglore
Class : Class 8

Ans 6:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Should it be d??

Ans 7:

Sumedha Mishra from xyz, School, Pune
Class : Class 8

Ans 8:

Rushil from Delhi Public School, Nashik
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 9:

Soham from Vibgyor high, Pune
Class : Class 8
It should be D as both manure and fertiliser have nutrients

Ans 10:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
should be option d

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noah farias from beacon high, Mumbai
Subject :NSO    Class : Class 2

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Ishan Das from Kendriya Vidayala Mankhurd, MUMBAI
Subject :NSO    Class : Class 6

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Nitim from TMIS, Bharatpur
Class : Class 6

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Nishit Vaity from Euro School Airoli, Navi Mumbai
Subject :NSO    Class : Class 5

Ans 1:

vedant from TSRS Aravalli, Gurgaon
Class : Class 5
13

Ans 2:

abhik kumar panda from timpany s s school, Vishakapatnam
Class : Class 5
13

Ans 3:

Supratim Biswas from DPS RUBY PARK KOLKATA, kolkata
Class : Class 5

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Ayush Aryan from Modern public school , North West Delhi
Subject :NSO    Class : Class 8

Ans 1:

Advika Singh from The Tribhuvan School, Patna
Class : Class 8

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Anagh Agrawal from Billabong high, JABALPUR
Subject :NSO    Class : Class 3

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