National Science Olympiad Forum By SOF Olympiad Trainer - Page 627
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Swati from Ryan, Bengaluru
Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

Harsh Kant from Gyan Ganga Educational Academy, Raipur
Class : Class 9

Ans 3:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 4:

sk from psbb millennium school, Chennai
Class : Class 9

Ans 5:

Gokul Warrier M from SRI KUMARANS MALLASANDRA, BANGALORE
Class : Class 9

Ans 6:

N Sankar Narahari from Madhavakripa English Nursery and Higher Primary School, Manipal
Class : Class 7
everybody just copy and paste it, can anyone explain in an easier way

Ans 7:

chepz from abc school, pandikkad
Class : Class 10
The common error is to think that pressure at 0.4h above the surface of the reservoir of mercury is 0.4 times the atmospheric pressure. The pressure at p is caused by the weight of mercury above point P. Thus preesure at P is equal to : 0.6x 100000 = 60000 Pa

Ans 8: (Master Answer)

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

Ans 9:

N Sankar Narahari from Madhavakripa English Nursery and Higher Primary School, Manipal
Class : Class 7
answer is b

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Mihir Arora from dpsg, ghaziabad
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

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

Ans 2:

Malav patel from Navrachana school sama , Vadodara
Class : Class 5
A is the correct answer as 1 and 2 are correct

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Harshita.B from Narayana e techno school, Poonamalle
Subject :NSO    Class : Class 3

Ans 1:

Thaneesha from Radcliffe School, Kharghar
Class : Class 7
Y...I DONT UNDERSTAND SOOOOO....................TELL MEH!!

Ans 2:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I too

Ans 3:

SHAUNAK from St Xaviers School, HAZARIBAG
Class : Class 3
The correct answer is D [friction].

Ans 4:

Karangat house from Navy Children School, Payyannur
Class : Class 3

Ans 5: (Master Answer)

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

Ans 6:

Arnav Yadav from Delhi Public School Rohini ,New Delhi, New Delhi
Class : Class 6
obviusly it will be d

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Kimaya and Sanaya from Ekya School, Bengaluru
Subject :NSO    Class : Class 3

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RAYAN NAJEEB from Delhi public school, RIYADH
Subject :NSO    Class : Class 1

Ans 1:

Akshat Singh Kushwaha from Billabong high international school , Bhopal
Class : Class 1

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
No, the answer is D because in the option A the second image is of a full moon and not a new moon.

Ans 3:

shruti badgujar from Modern English School , Aurangabad
Class : Class 2
a

Ans 4:

Saiansh Biswas from Little Flower School, Jamshedpur
Class : Class 4
I think the correct answer is a, not d.

Ans 5:

Parth Kaushish from MDPS, Faridabad
Class : Class 6

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Adithi Keshava from National Center For Excellence , Bangalore
Subject :NSO    Class : Class 4

Ans 1:

adhiraj chaudhary from apeejay school noida, noida
Class : Class 3
blah blah blah every one

Ans 2:

vivaan sethi from GD goenka public school, Delhi
Class : Class 4
all of you shut up especially ajinkya

Ans 3:

Ajinkya Kamble from Thakur public school, Mumbai
Class : Class 7
the question you had given ,in the solution of the question of it is another one,the solution of the real question was its solution so we could not find the solution of this question.

Ans 4:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 9
why the question have given like this I don't know. why olimpiadtrainer sometimes do like this.Can anyone tell me the answer.I request to you all.Please help me or else I have tell to my father.I don't want to tell my father.I beg to you please.

Ans 5:

adhiraj chaudhary from apeejay school noida, noida
Class : Class 3
you all are mad

Ans 6:

Ishaani Jha from VIBGYOR High Hennur, Bengaluru
Class : Class 5
why is everyone arguing?

Ans 7:

adhiraj chaudhary from apeejay school noida, noida
Class : Class 3
i will tell to your dad das ji

Ans 8:

Ishaan Singh from BBPS, Gurugram
Class : Class 9
The answer is B.

Ans 9:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 9
kojjk

Ans 10:

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

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Aryan Goyal from DPS , Dwarka, New Delhi
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
No, the correct answer is D. When written in decimal, the value of it comes out to be 0.2 and the rest are bigger than it. In fractions, as the denominator gets bigger, the number gets smaller.

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JOSH K SINGH from SACRED HEART, LUDHIANA
Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

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

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Aswath Krishna from DPS EAST, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 9
Bcoz when glass Q is painted with light blue we are still able to see the mark , that means its still translucent. When glass R is painted with black, we are not able to see as black is an opaque color. This what the logic meant for. So, option B is correct

Ans 2:

Shaurya Rai from Vibgyor High Balewadi, Pune
Class : Class 6
Option A can also be a correct answer because the transparency of the glass is not mentioned. It can be translucent or transparent as well.

Ans 3:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 9

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Falguni and Tanmay , the C option is correct as R is opaque but the question is through which slide can we see the X mark clearly or partially and we can't see through because as you said R is opaque . Answer D is not correct either because colour affects the transparency of the slide. Answer A is not correct because P is transparent not translucent. That leaves us with Option B which is correct as Q is translucent and the students can see the X partially through it . Hope this explanation helps you clear all your doubts about this question.💜💜💜Oh and by the way completely not related to the question who else is an army ( BTS fans ) ?

Ans 5:

Shuvangi Das from Vivekananda mission school, haldia
Class : Class 9

Ans 6:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4
slide r is opaque and slide q is translusent

Ans 7:

Arsh from Lahs, Gwalior
Class : Class 3
why!

Ans 8:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4
yes even c is the correct ans falguni is saying right

Ans 9:

Aarush Goyal from D.A.V Pblic school, Sector 14, Faridabad
Class : Class 6
IT IS AND THE ANSWER IS B

Ans 10:

Shourya Kumar from Delhi Public School Noida, Noida
Class : Class 9
it is correct r is opaque and we would not be able to see the mark

Ans 11:

Anika Saha from New Town School, KOLKATA
Class : Class 6
All of them were made of glass. So if P was left as it is without painting wouldn't it be transparent??

Ans 12:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Sorry for the typo answer C is incorrect

Ans 13:

Falguni from Navkis, Bangalore
Class : Class 7
Even C is correct. In the workbook solution it’s given that slideR is supposed to be opaque

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Aryan Goyal from DPS , Dwarka, New Delhi
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

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

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