National Science Olympiad Forum By SOF Olympiad Trainer - Page 385
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Mahadevan from KV Rubber Board Kottayam, Kottayam
Subject :NSO    Class : Class 5

Ans 1:

Sai Arinesh from ,
Class : Class 5
SORRY ABOUT THE MISUNDERSTANDING

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

If these toxic chemicals enter the nearby waterbodies, they cause the microalgae population in the water-body to grow uncontrollably, causing algal bloom. These algae lower the oxygen levels in the water and cause harm to aquatic life. Toxic chemicals mixed with soil and water are absorbed by food plants and they become unfit for consumption. Toxic chemicals in the soil will cause soil pollution and water pollution. They will not cause air pollution.

 


Ans 3:

Sai Arinesh from ,
Class : Class 5
but the answer you have said is both A and B? IT SHOWS ANSWER = D

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AARNA Kapse from The swaminarayan school, Nagpur
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

Reusing old cans, bottles and newspapers means you won’t be buying new ones from market. This will help to conserve natural resources that are used for making new cans, bottles and newspapers. So, this will help to control environmental pollution.


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Pradhyumna K from SRI BHUVANENDRA RESIDENTIAL SCHOOL, Karkala
Subject :NSO    Class : Class 8

Ans 1:

ANUSHKA SHARMA from CAMBRIDGE COURT WORLD SCHOOL, JAIPUR
Class : Class 8
Testes which is the primary sex organ in male reproductive system, produces the male gamete sperm as well as male hormone Testosterone

Ans 2:

Pradhyumna K from SRI BHUVANENDRA RESIDENTIAL SCHOOL, Karkala
Class : Class 8
Testes

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Riddhiman Bose from Don Bosco School, Kolkata
Subject :NSO    Class : Class 5

Ans 1:

Biju Pappachan from Rkc , Raipur
Class : Class 1
I would have known the answer if there was a clearer pic

Ans 2:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
How is Fig. (b) Adding fertilisers to field? https://www.sofolympiadtrainer.com/forum/user/467395 Pls. reply

Ans 3:

Akshaj V from PSBB Senior Secondary School, Chennai
Class : Class 6
All your pictures are blurry and dull. Could you please try to make it colourful and visible? Thank you.

Ans 4:

Koustavi Chakraborty from DELHI PUBLIC SCHOOL, PUNE
Class : Class 5
correct answer isd

Ans 5:

Pratham Dave from GNS, Bangalore
Class : Class 7
D is the answer to this question

Ans 6:

Vihaan Patil from Bombay Scottish School, Mahim Mumbai
Class : Class 6
options given are wrong

Ans 7: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

Ploughing the field(d)→Adding fertilisers to the field(b)→Sowing the seeds(e)→Irrigation of crops(a)→Spraying pesticides(c)


Ans 8:

PRAGWANSH JENA from DELHI PUBLIC SCHOOL, Raipur
Class : Class 8
D

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Aarav Srivastav from DWPS , Noida Extension
Subject :NSO    Class : Class 6

Ans 1:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Answer is C .Because Vitamin D is formed in our body due to exposure to sunlight through colestrol so option A is right .deficiency of vitamin D and calcium causes rickets .calcium is present in milk but not sometimes in its products .so the correct answer is C

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shawn pal from DPS Gandhinagar, AHMEDABAD
Subject :NSO    Class : Class 8

Ans 1:

ANUSHKA SHARMA from CAMBRIDGE COURT WORLD SCHOOL, JAIPUR
Class : Class 8
The answer is (b) According to Kepler's second law, the angular momentum of the planet is constant. The angular momentum of the planet does not vary, i.e. the aerial velocity of the planet remains constant.

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Parth Gupta from Presidium Gurgaon, Gurgaon
Subject :NSO    Class : Class 6

Ans 1:

Shreyasi Padihary from National Public School East , Bengaluru
Class : Class 7
A

Ans 2:

Maanasa from PSBB Siruseri, Chennai
Class : Class 8
the answer is D the server is right

Ans 3:

Soundarya pandey from SVM ,Vasai east, Vasai
Class : Class 7
the answer is d

Ans 4:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
answer is A .

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Shreshta from Presidium, Ghaziabad
Subject :NSO    Class : Class 4

Ans 1:

Bhavya Sheth from Bright Day School, Vadodara
Class : Class 6
14 X 7 = 98 not 56 see the solution then put answer on the forum .

Ans 2:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 3:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
Isn't this an IMO question????????!!!!!!!!!!!!!!!!!!!!!!!

Ans 4:

jathin from national public school chikkabanavara, banglore
Class : Class 4
the answer is : b 2,4,8,14,28

Ans 5:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi
Class : Class 7
answer is B

Ans 6:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 2
B

Ans 7:

DC from biv, PUNE
Class : Class 5
b is the answer

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AARNA Kapse from The swaminarayan school, Nagpur
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Animals X and Y shown in the figure are of shark and rat respectively. Shark is a carnivore and rat is an omnivore. Similarly in option C clouded leopard is a carnivore and skunk is an omnivore. 


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aritro bhaumik from lotus valley, Noida
Subject :NSO    Class : Class 7

Ans 1:

SANGYAN MISHRA from ST. KARENS HIGH SCHOOL PATNA, PATNA
Class : Class 7

Ans 2:

Hritvi from Podar International School, Mumbai
Class : Class 7
There are 2 parts in this question which are not at all inter-related.The average speed (2nd part) question is the incomplete question of Q.10

Ans 3:

Advik Tripathi from The Khaitan School, Noida
Class : Class 8
I tried doing it, nothing came out! Hell!!

Ans 4:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9
NA

Ans 5:

Rishi from Deens Academy, BENGALURU
Class : Class 9
exactly!!!its bugged

Ans 6:

GAUTHAM GOPINATH from BPDAV School, HYDERABAD
Class : Class 10
How is the first part of the question related to the second part?

Ans 7:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9
The question has a bug

Ans 8:

Palash sachin patel from Kips, Patan
Class : Class 8
correct options are not given

Ans 9:

RIYA D MARGHADE from TVS VELAMMAL VIDYALAYA PONNERI, CHENNAI, CHENNAI
Class : Class 3
They added question no 10 in this question... Please look into this Sof

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