National Science Olympiad Forum By SOF Olympiad Trainer - Page 272
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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:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
How is Fig. (b) Adding fertilisers to field? https://www.sofolympiadtrainer.com/forum/user/467395 Pls. reply

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5: (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 6:

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

Ans 7:

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

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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:

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

Ans 2:

Maanasa from Billabong high, Chennai
Class : Class 6
the answer is D the server is right

Ans 3:

Soundarya pandey from SVM ,Vasai east, Vasai
Class : Class 6
the answer is d

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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:

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

Ans 3:

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

Ans 4:

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

Ans 5:

Bushra aslam from uttam, Ghaziabad
Class : Class 8
B

Ans 6:

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

Ans 7:

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

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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

Which of the following statements are correct?
(i) Time period of a simple pendulum is the time taken by the pendulum to complete one oscillation.
(ii) The area under the speed-time graph on time axis is the distance.
(iii) Heat is exchanged between two bodies if they have different amount of heat but have same temperature.
(iv) In an electrical circuit, short circuit occurs when a naked live wire and a neutral wire come in direct contact.
(v) When a light wave and a sound wave travel from air into water, their speeds are decreased.
a. (i), (ii) and (iv) only
b. (i), (ii) and (iii) only
c. (ii), (iii) and (iv) only
d. (iii), (iv) and (v) only
Given that average speed of the car is 60 km h–1.
What is the value of x?

A 120 km
B 180 km
C 240 km
D 720 km


the questions wrong, two questions are colliding

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

Advik Tripathi from The Khaitan School, Noida
Class : Class 7
I tried doing it, nothing came out! Hell!!

Ans 6:

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 7:

Rishi from Deens Academy, BENGALURU
Class : Class 7
exactly!!!its bugged

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VIVAAN GARG from KR MANGALAM WORLD SCHOOL, FARIDABAD
Subject :NSO    Class : Class 4

Ans 1:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi
Class : Class 7
CORRECT ANS IS A

Ans 2:

Rasha Ranjan from DPS NOIDA , Noida
Class : Class 5
The correct answer is D because when sun heats the land air rises up from the land so the option 4 is also correct , hence D is correct option

Ans 3:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
Pls explain!

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The answer is B .

Ans 5:

jathin from national public school chikkabanavara, banglore
Class : Class 4
the correct answer is : B

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