National Science Olympiad Forum By SOF Olympiad Trainer - Page 347
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Wrik Chatterjee from DELHI PUBLIC SCHOOL NOIDA, Noida
Subject :NSO    Class : Class 1

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Yash Bindal from Global Indian International School, Singapore
Subject :NSO    Class : Class 9

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Saksham from Hans raj model school, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Bhanvi Chowdhary from Innocent hearts , jalandhar
Class : Class 10
humus

Ans 2:

Saanvi Prasad from DPS Noida, Noida
Class : Class 5
Huh.Couldn't find this anywhere on forum

Ans 3:

Advait Bhasin from tbs, gurgaon
Class : Class 9

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Sahasra Shanker from KV IIT, Chennai
Subject :NSO    Class : Class 8

Ans 1:

LAKSHITA from Hansraj Public School, Panchkula
Class : Class 6
what is the unit of pressure

Ans 2:

Pranav from JSS Public School, Bengaluru
Class : Class 10
Density of oil = 0.80 g/cc = 800 kg/m3Density of water = 1 g/cc = 1000 kg/m3Pressure of water = Height will be 1 m half filled⟹ hdg = 1m×1000kg/m3×10m/s2 = 10000 PaPressure by oil = hdg = 1 x 800 x 10 = 8000 PaTotal pressure = 8000Pa 10000Pa = 18000Pa = 1.8×104N/m2

Ans 3:

Kashish Kathuria from Delhi Public School, Bangalore
Class : Class 9
But let's see for nowI am Kashish

Ans 4:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8
Can anyone please explain this

Ans 5:

Kashish Kathuria from Delhi Public School, Bangalore
Class : Class 9
I guess it is wrong

Ans 6:

The Address from Somaiya, Mumbai
Class : Class 6

Ans 7:

Kashish Kathuria from Delhi Public School, Bangalore
Class : Class 9
I did not understand

Ans 8:

The Address from Somaiya, Mumbai
Class : Class 6

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Shayan Bari from Kendriya Vidyalaya, Katihar
Subject :NSO    Class : Class 7

Rahul gets an assignment to make a list of fabrics made of different fibres. He takes piece of fabric X and Y and burns them to identify the fibre. Fibre X burns with smell of burning plastic and fibre Y with smell of burning hair. Identify the fabrics X and Y.

             X                Y
ANylon          Cotton
BCotton          Silk
CWool            Polyester
DPolyester      Silk


Silk burns with the smell of charred meat, not burning hair.

Ans 1:

Soumyajit Roy from Delhi Public School Jamnagar, Jamnagar
Class : Class 9
It should be A

Ans 2:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
tttt

Ans 3:

Anamkhan Mulla from Navrachna Sama, Vadodara
Class : Class 7
cotton-burning paperwool-burning hairsilk-charred meat

Ans 4:

Pratham Dave from GNS, Bangalore
Class : Class 7
Yes, The answer should be A and not D

Ans 5:

Anish from Vibgyor, Pune
Class : Class 8
silk smells of charred meat . This was the answer given even in the chapterwise question bank

Ans 6:

Agastya Varshney from Podar International School , Mumbai
Class : Class 7

Ans 7:

Akshay Jha from DPS NERUL, Navi Mumbai
Class : Class 7
All options are wrong, it can't be A because cotton burns with smell of burning paper and similarly it can't be D because silk burns with an odour of charred meat.

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Sahasra Shanker from KV IIT, Chennai
Subject :NSO    Class : Class 8

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Sahasra Shanker from KV IIT, Chennai
Subject :NSO    Class : Class 8

Ans 1:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8
Isn't it option a ?

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Tamrashi Pani from National Public School, Bangalore
Subject :NSO    Class : Class 6

Ans 1:

Mayank Das from Army Public School Bolaram, Hyderabad
Class : Class 2
magnet y should attract towards magnet z cause they both have the same pole facing towards each other

Ans 2:

Ananya from GIIS, Bangalore
Class : Class 6
can also be option B right?

Ans 3:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
correct answer : D

Ans 4:

Aarush Patil from St.Arnold's, pune
Class : Class 1

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Tamrashi Pani from National Public School, Bangalore
Subject :NSO    Class : Class 6

Ans 1:

Saransh Tiwari from null, null
Class : Class 8

Ans 2:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
Current flows from positive terminal to negative terminal.... so the bulbs will glow simultaneously

Ans 3:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
D is correct

Ans 4:

SAI SHOURYA VARDHAN from T.I.M.E School, Hyderabad
Class : Class 7

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Sahasra Shanker from KV IIT, Chennai
Subject :NSO    Class : Class 8

Ans 1:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8

Ans 2:

The Address from Somaiya, Mumbai
Class : Class 6

Ans 3:

The Address from Somaiya, Mumbai
Class : Class 6

Ans 4:

The Address from Somaiya, Mumbai
Class : Class 6

Ans 5:

Anoushka Anbu from Amara Jyoti Public School, Bengaluru
Class : Class 8
Because option a is correct as reaction takes place in all three beakersOption b is also correct as Mg is more reactive than Zn.Option c is also correct as Zn is more reactive than Ag.Option c is also correct because

Ans 6:

Sahasra Shanker from KV IIT, Chennai
Class : Class 6
why??????????????

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