National Science Olympiad Forum By SOF Olympiad Trainer - Page 574
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RAYAN NAJEEB from Delhi public school, RIYADH
Subject :NSO    Class : Class 1

Ans 1: (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 2:

Parth Kaushish from MDPS, Faridabad
Class : Class 6

Ans 3:

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

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 3
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:

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

Ans 2:

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 3:

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

Ans 4:

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

Ans 5:

Ishaan Singh from BBPS, Gurugram
Class : Class 7
The answer is B.

Ans 6:

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

Ans 7:

Ishaani Jha from Silver Oaks International Whitefield, Bengaluru
Class : Class 4
why is everyone arguing?

Ans 8:

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 9:

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

Ans 10:

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

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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

Which of the following statements are incorrect?
(i) Cellular respiration is a physical process in which food molecules are broken down into carbon dioxide and water.
(ii) Anaerobic respiration involves breakdown of glucose into alcohol and carbon dioxide.
(iii) Breathing rate varies according to oxygen requirement of the body.
(iv) On land, frogs breathe through lungs and in water by gills.
(v) Respiration in plants occurs through stomata and lenticels.

A(i), (ii) and (iv) only
B(i) and (iv) only
C(ii), (iii) and (v) only
D(ii), (iii) and (iv) only

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

A science teacher labelled three glass slides as P, Q and R. She painted slide Q with light blue colour, slide R with black colour and slide P was left as such.
Then she asked students to put the slide on a white paper having (X) mark on it.
Students will be able to see the mark clearly (or partially)

A In slide P as it is translucent
B In slide Q as it is translucent
C In slide R as it is opaque
D In all the slides as paint does not change the nature of glass.


It's written'Students will be able to see the mark clearly (or partially)'. What should I do the question is not even making up it's mind!

Ans 1:

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

Ans 2:

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

Ans 3:

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 4:

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

Ans 5:

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

Ans 6:

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 7:

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 8:

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 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:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Sorry for the typo answer C is incorrect

Ans 12:

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

Ans 13:

Ashwak from Cambridge, Jalandhar
Class : Class 8
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 ) ?

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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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Yashaswee Gupta from Bhavan's Vidyashram, Jaipur
Subject :NSO    Class : Class 4

Nidhi knocked three metal thumbtacks into the middle section of a block of wood and covered this section with a piece of white paper. Then, she brought a lighted candle near this section.
After few seconds, she removed the lighted candle and found burn marks on the paper except on the areas where the thumbtacks were present. Which of the following best explains this observation?


A The paper was a good conductor of heat.
B The thumbtacks and the paper had different temperatures.
C Some parts of the wood absorbed the heat from the candle flame.
D The thumbtacks conducted heat away quickly before the paper could get burnt.


Ans 1:

SRISANTH from Edify, Tirupathi
Class : Class 5

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 3:

Riddhima Pandey from Chinmaya Vidyalaya, Bokaro Steel City
Class : Class 3
The thumb tacks were a good conductor of heat it was knocked in the wood so it could have easily condected the heat in itself

Ans 4:

Atheeq Ahmed Shaik from Ravindra Bharathi Global School, chennai
Class : Class 6
d

Ans 5: (Master Answer)

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

Ans 6:

Ashwak from Cambridge, Jalandhar
Class : Class 8
The correct answer should be A!!!!!

Ans 7:

Aahana Agarwal from NPS Koramangala, Bengaluru
Class : Class 6
I can't get the answer of this one.

Ans 8:

ANURADHA NAIR from SANDEEPANI VIDYA NIKETHAN SCHOOL, Thrissur
Class : Class 9
IT IS D ANURADHA 4 C SVN KUTTUMUKKU

Ans 9:

Sayan Duary from Vidyasagar Shishu Niketan, Paschim Medinipur
Class : Class 8
The correct answer will be D

Ans 10:

Alisha from Delhi Public School , bopal, Ahemdabad
Class : Class 8
No idea........can someone just tell me how D??????????????????????????????

Ans 11:

Atheeq Ahmed Shaik from Ravindra Bharathi Global School, chennai
Class : Class 6
d

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Ram kumar Rathore from Akshara, Pune
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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Nitin Shekhar from K V GERUKAMUKH, DHEMAJI
Subject :NSO    Class : Class 7

Ans 1:

SUVAMDEBNATH from KVS BAMANGACHI, Howrah
Class : Class 9
(c)

Ans 2:

Aham from vibgyor high, Bangalore
Class : Class 8
the first option in coloumn two isnt even a graph!

Ans 3:

Janani swethaa from CS ACADEMY, Erode
Class : Class 10

Ans 4:

Venya Vikas from Chirec International , Hyderabad
Class : Class 7
correct option should be C

Ans 5:

Nayanaa Gupta from Modern Vidya Niketan Aravali Hills , Faridabad
Class : Class 8

Ans 6:

Nityashree Neelakandan from null, null
Class : Class 9

Ans 7:

Aman Sumesh from Apeejay School, Kharghar
Class : Class 8
The correct answer is Option(C).

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Sahasra Shanker from KV IIT, Chennai
Subject :NSO    Class : Class 6

Ans 1:

Amrik Pal from Kendriya Vidyalaya DRDO, Bangalore
Class : Class 6
d

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