National Science Olympiad Forum By SOF Olympiad Trainer - Page 631
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Puneet Arora from ,
Subject :NSO    Class : Class 6

Ans 1:

Yojit kashyap from APS Ahmedabad, Ahmedabad
Class : Class 6
It is reversible and chemical because salt has sodium and chlorine and water has hydrogen and oxygen so different item formed It is reversible because you can separate them by evaporating the water

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Gaurab Das from DPS School, Bengaluru
Subject :NSO    Class : Class 9

Ans 1:

from d.g.v. sr. sec. school, rohtak
Class : Class 9
correct option is not given

Ans 2:

Aditi Agrawal from Sunbeam School Bhagwanpur, VARANASI
Class : Class 9
How can gravitational force increase with altitude?

Ans 3:

Aardev from Choithram School Manik Bagh, Indore
Class : Class 9
ALL THE OPTIONS ARE INCORRECT

Ans 4:

Aryan Srivastava from Jayshree Periwal High School, Jaipur
Class : Class 9
this is wrong

Ans 5:

aryan kushwaha from delhi public school amballa, amballa
Class : Class 9
GRAVITATIONAL CAN NOT INCREASE WITH ALTITUDE

Ans 6:

from ,
Class : Class 10
Gravitational force decreases when altitude increases as gravity is inversely proportional to square of distance that separates earth and the body

Ans 7:

harnoor from cambridge international school, nawanshahr
Class : Class 9
answer given is wrong

Ans 8:

sathvik from nsm public school, vijaywada
Class : Class 9
all the options seem inapropriate for this

Ans 9:

Rishit Saini from R. A. N. Public School , Rudrapur
Class : Class 9
the question is wrong.

Ans 10:

Ridhi Goyal from DAV Public School, Ludhiana
Class : Class 9

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Yashvi Agrawal from DPS Indirapuram, Ghaziabad
Subject :NSO    Class : Class 6

Ans 1:

Puneet Arora from ,
Class : Class 5
Option c

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Roshan Choudhary from Aps tezpur , Tezpur
Subject :NSO    Class : Class 3

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Augustine from , coimbatore
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

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meenakshi jain from mvn, faridabad
Subject :NSO    Class : Class 4

Ans 1:

Risha Jakhotiya from Sanskriti School , Pune
Class : Class 3
The correct answer is B

Ans 2:

Parikshit G from DPS Panvel, NAVI MUMBAI
Class : Class 8

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The materials used to make given objects are wool , leather , cotton and silk . Out of these , only leather is hidden..... Hence , option C is correct .

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is B.

Ans 5:

Arnesh from DPS Mathura Road , New Delhi
Class : Class 7
I dont know which one is correct C or B

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Vishad Jain from Borivali, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

INDRANI GHOSH ROY from AMRITA VIDYALAYAM, Durgapur
Class : Class 5
Answer will be C, not D

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jyoti from kps, Noida
Subject :NSO    Class : Class 6

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guruprasad mishra from Sanskar public school , Raigarh
Subject :NSO    Class : Class 7

Ans 1:

Medha Bhutani from Christ Academy, Bengaluru
Class : Class 9
The correct answer is option D

Ans 2:

Sriyansh from Surabhi , Hosapete
Class : Class 9
Plants perform photosynthesis because they need to prepare their food and during night time they respire to break down the prepared food. In seeds food is already prepared and stored in the cotyledons and a seed only needs to break it down(so they respire producing co2). this co2 increases the temperature in the flask.

Ans 3:

Sriyansh from Surabhi , Hosapete
Class : Class 9
Plants perform photosynthesis because they need to prepare their food and during night time they respire to break down the prepared food. In seeds food is already prepared and stored in the cotyledons and a seed only needs to break it down(so they respire producing co2). this co2 increases the temperature in the flask.

Ans 4:

Sriyansh from Surabhi , Hosapete
Class : Class 9
Plants perform photosynthesis because they need to prepare their food and during night time they respire to break down the prepared food. In seeds food is already prepared and stored in the cotyledons and a seed only needs to break it down(so they respire producing co2). this co2 increases the temperature in the flask.

Ans 5:

Sriyansh from Surabhi , Hosapete
Class : Class 9
Plants perform photosynthesis because they need to prepare their food and during night time they respire to break down the prepared food. In seeds food is already prepared and stored in the cotyledons and a seed only needs to break it down(so they respire producing co2). this co2 increases the temperature in the flask.

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Atharva Prakash Bhosale from St.Xaviers High School Kolhapur, Kolhapur
Subject :NSO    Class : Class 7

Ans 1:

Ritobhash Bhattacharya from DAV Model School, Kharagpur
Class : Class 7
We could draw an imaginary line from C perpendicular to EC and parallel to AB dividing angle y into 2 parts and marking the point as R. Now RCA = CAB =22 as they are alternate interior angles & RCE = ECD = 90. So angle y will be equal to 90+22=112.

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