National Science Olympiad Forum By SOF Olympiad Trainer - Page 677
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Pulkit Gupta from Maxfort School, New Delhi
Subject :NSO    Class : Class 6

Ans 1:

ARAMINTA SAHA from VIBGYOR HIGH BALEWADI, PUNE
Class : Class 6
ans is d because it is transparent which allows light to pass, it doesn't observe light but transmits all light

Ans 2:

Devdarsh hero from HOLY GRACE, Mala
Class : Class 6
ans is D

Ans 3:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
@ashwak control your language

Ans 4:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 7

Ans 5:

Bhabani Prasad from Narayan School, Kolkata
Class : Class 6
D is the ans as air is matter and is very transparent.

Ans 6:

Arsh from Lahs, Gwalior
Class : Class 3
ans is d sof !!!!!!!!!!!!! ans is d

Ans 7:

Tanishtha from DPS, Greater Noida
Class : Class 7
ans is d

Ans 8:

Anika Saha from New Town School, KOLKATA
Class : Class 6
ANS IS D

Ans 9:

malhar thorve from city internqtional school, satara road, pune
Class : Class 7

Ans 10:

AJAY LAHOTI from SPRINGDALES DUBAI, Dubai
Class : Class 6
I should be d

Ans 11:

Tanishtha from DPS, Greater Noida
Class : Class 7
ans is d

Ans 12:

Pratheek from Null, Null
Class : Class 4
Option D. All of the above.

Ans 13: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 14:

Shruti Rajshree from NPS Indiranagar, Bengaluru
Class : Class 3
answer is B as given in the answers. there is a solution too

Ans 15:

Aarnav Grover from Anand Niketan Shilaj, Ahmedabad
Class : Class 9
I think its D not B

Ans 16:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9
Answer is D

Ans 17:

Ishayu Mukherjee from Don Bosco Park Circus, Kolkata
Class : Class 6
The answer is wrong. The correct answer is D

Ans 18:

Thejaswini from Rajagiri, Chennai
Class : Class 7

Ans 19:

Mitra Maiti from Techno India Group Public School, Bolpur Prantik
Class : Class 6
It is true that air is a perfectly transparent object. It neither absorbs nor reflects light. It transmits whole of light. So, all the options are correct and answer is D.

Ans 20:

Videh Jain from Bluebells School International, Delhi
Class : Class 6
d is the ans

Ans 21:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer is D

Ans 22:

kpks14 from RIMT World School, Chandigarh
Class : Class 7
d is the answer but the trainer is showing b as answer air reflects light that is why the sky is blue

Ans 23:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
Answer is D as air it neither absorbs or reflects light,its almost transparent,it transmits the whole of light.

Ans 24:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
THE ANSWER IS D

Ans 25:

Mihika Hivarekar from Global Indian International School, Pune
Class : Class 7
CHILL PPL CHILL

Ans 26:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
I agree with everyone is Satwik because air trasparent it neither reflects nor absorbs light and trasmits whole of light So ans is D

Ans 27:

Siddharth from DPS, Jodhpur
Class : Class 9
The correct answer should be option D, All of these

Ans 28:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Explain this dumb question and an even dumber answer " Master Answer"

Ans 29:

Karthik from Euro, Bengaluru
Class : Class 7
ans is d

Ans 30:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
ans is d

Ans 31:

Aarav Garg from DPS Greater Noida, Greater Noida
Class : Class 7
It should be d but they are telling its b.

Ans 32:

Advik from DPS Patna, Patna
Class : Class 4
its got to be ddddd!!

Ans 33:

pranavramesh from sri chaitanya techno school, Chennai
Class : Class 6
sof the answer is ddd so many times i am really fed up of your wrong answers and that is really very shamful on you.

Ans 34:

Utkarsh Chakravarty from Pinnacle High International School, Mumbai
Class : Class 6
i mean except Satwik

Ans 35:

Ashwak from Cambridge, Jalandhar
Class : Class 9
What in the freaking world . I am surprised that these dumb idiots can even host international and national olympiads . Even a 5 year old could get the answer right . I won't be surprised if they give the answer 22 of the question 2 2 . I am telling you we are wasting money on these damn question papers

Ans 36:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
Answer is d

Ans 37:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
i agree with d

Ans 38:

khushi Joshi from Svkm , Mumbai
Class : Class 10
Ans is D as air is all of the above

Ans 39:

Aditya Sai Kedarisetty from Sri Kumarans childrens Academy DKS, Bangalore
Class : Class 7
The answer is 'D' option, 'All of the above'. It is so because Air is not visible because it neither absorbs nor reflects light, it transmits whole of light. Dust particles in air is visible as they reflect light. Air is almost transparent substance. It is not dust to be visibile. It is air, it is completely transparent.

Ans 40:

Naisha from Brilliant public school b, Bilaspur
Class : Class 8
D

Ans 41:

arnav santosh shinde from new english school , landewadi
Class : Class 4
ANS IS D

Ans 42:

Pratheek from Null, Null
Class : Class 4
Option D. All of the above.

Ans 43:

Agrim Jai from Modern Bharakhamba, Delhi
Class : Class 7
D

Ans 44:

satwik patnaik from DPS Rourkela, Rourkela
Class : Class 7
And is b

Ans 45:

Parth Kaushish from MDPS, Faridabad
Class : Class 6
its D come on two total mistakes in one test

Ans 46:

niuv from meridian, Hyderabad
Class : Class 6
ANS IS D

Ans 47:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
these days sof olympiad trainer has gone mad. in one test, i got 4 perfectly wrong question . and now this . this adds up to fivei do not know what is the problemans should be ddddddddd!!!!!

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Swati from Ryan, Bengaluru
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

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

Ans 2:

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 3:

Sumedha Mishra from xyz, School, Pune
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:

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

Ans 8:

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

Ans 9:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

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

Ans 1:

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

Ans 2: (Master Answer)

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

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

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I too

Ans 2:

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

Ans 3:

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

Ans 4: (Master Answer)

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

Ans 5:

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

Ans 6:

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

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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:

Parth Kaushish from MDPS, Faridabad
Class : Class 6

Ans 2:

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

Ans 3: (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 4:

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

Ans 5:

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

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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:

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

Ans 3:

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

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:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

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 10:

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

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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:

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 2:

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

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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 7:

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

Ans 8:

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

Ans 9:

Arsh from Lahs, Gwalior
Class : Class 3
why!

Ans 10:

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

Ans 11:

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

Ans 12:

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 13:

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

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