National Science Olympiad Forum By SOF Olympiad Trainer - Page 581
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kpks14 from RIMT World School, Chandigarh
Subject :NSO    Class : Class 6

Ans 1:

Viraaj from Mount litera zee school, Hyderabad
Class : Class 7
II,III and IV are correct, none of options are correct and in I it should be sieving/handpicking

Ans 2:

aarav shankar from st xaviers high school, gurugram
Class : Class 7
Neither of the options is correct. Even solution is not explaining it well. Kindly tell the correct answer because I think that III and IV are correct.

Ans 3:

Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Class : Class 6
D

Ans 4:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
answer is Only

Ans 5:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
dheeraj, it is alking about that the statement is correct.mud and water can be separated by many ways but it is asking nly about statemnt(whether the mentioned thing in "statement are crrect r not

Ans 6:

Shreyansh Gupta from MVN, faridabad
Class : Class 6
but 1st option is incorrect?????????????????????

Ans 7:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 7
B is the answer

Ans 8:

Asank Kumar from Delhi Public School, navi mumbai
Class : Class 10
bruh

Ans 9:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
first option is to wrong

Ans 10:

Srimoyee Roy from Christ academy , Bangalore
Class : Class 6
II, III AND IV are correct. There is no option like II, III AND IV so the coorect answer is B which includes II AND IV. Larger particles can be seperated from smaller particles by sieving. There is a error in the question

Ans 11:

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

Ans 12:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 7
c is correct not b

Ans 13:

Atul Sanjeev from Indian School Al Ghubra, Muscat
Class : Class 9
Larger solid particles are separated from smaller ones by sieving

Ans 14:

pranavramesh from sri chaitanya techno school, Chennai
Class : Class 6
answer should be d

Ans 15:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 6
(ii) and(iii) are correct whereas the answer to (i) is handpicking and the answer for (iv) is winnowing

Ans 16:

Viraaj from Mount litera zee school, Hyderabad
Class : Class 7

Ans 17:

Satvik Pattanaik from GreenwoodHigh, bangalore
Class : Class 6
the question is wrong all the options are correct. it is given in the synopsis that centrifugation is used to separate cream from milk.

Ans 18:

Adrija Mishra from SRDAV public school, Delhi
Class : Class 7
i think all are correct, because I am the topper.........

Ans 19:

Shashwat Amit from ,
Class : Class 6
The answer should be B as it is written in the synopsis that cream is separated from milk by centrifugation.

Ans 20:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Bruhhhh this is so easy wish questions like these were on NSO

Ans 21:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
Mud and water can be separated by loading, sedimentation, decantation, AND filtration.So, answer should be B

Ans 22:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 9
answer should be 'd'

Ans 23:

Shreyansh Gupta from MVN, faridabad
Class : Class 6
BRUHHHHHH i got 20/20 in all tests this is more than easy like NSO

Ans 24:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8

Ans 25:

Aaditya Verma from Mayoor, Noida
Class : Class 8

Post Your Answer

USHASHI CHAKRABARTI from INDUS VALLEY WORLD SCHOOL, CALCUTTA
Subject :NSO    Class : Class 6

Ans 1:

Viraj Upadhyay from The Khaitan School, Noida
Class : Class 6
translucent bcz the light is passing partially from the window

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Chinmay Barje from DSRV, Mumbai
Subject :NSO    Class : Class 7

Ans 1:

Akshay Jha from DPS NERUL, Navi Mumbai
Class : Class 7

Ans 2:

Aryan Keswani from Delhi Public School, Mathura Road, New Delhi
Class : Class 10

Post Your Answer

Dhars from DPS EAST Bangalore , Bengaluru
Subject :NSO    Class : Class 8

Ans 1:

Student from School, City
Class : Class 8
Chromium is more expensive

Ans 2:

Tanushree Rahul Raghatate from Bhavans B.P.Vidya Mandir, Nagpur
Class : Class 8
CHROMIUM IS AN EXPENSIVE METAL SO WHOLE OBJECT COULD NOT BE MADE OF IT. SO CORRECT ANSWER SHOULD BE B.

Ans 3:

Aarna Gupta from DPS EAST, BANGALORE , Bengaluru
Class : Class 9
chromium is expensive . so answer should be B

Ans 4:

Aarna Gupta from DPS EAST, BANGALORE , Bengaluru
Class : Class 9

Ans 5:

IAMLOST from ABC, Pune
Class : Class 8
In the SOF book, Option B is correct. How come here Option D?

Ans 6:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
the people of SOF should be wise but they are acting like dummies.. Its like they don't know that CHROMIUM IS AN EXPENSIVE METAL. IF IT WAS CHEAP WHY WOULD ITEMS NEED TO BE ELECTROPLATED!! BECAUSE OF THIS MISTAKE I LOST A MARK AND IN THE 1ST QUESTION TOO BECAUSE OF THEIR HORRIBLE MISTAKES.. I AM VERY ANGRY NOW.. I MEAN LIKE 2 MISTAKES IN 1 TEST?!?!.. REALLY?!?

Ans 7:

S V Harini from Vailankanni public school , Krishnagiri
Class : Class 8
chromium is not cheapif it is cheap then the whole material can be made of chromium, why do they electroplate it if its cheapoption D is wrong and option B is correct

Ans 8:

Anshuman D from MVM, Hyderabad
Class : Class 9
It means that in place of electroplating the object with some other metal like silver ,it is cheaper to electroplate it with chromium

Ans 9:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 10

Ans 10:

Gaurish Singla from DPS School Sector 19, Faridabad
Class : Class 8
Correct answer is B

Ans 11:

Bipasana from KV IIT Kanpur, Kanpur
Class : Class 9
B

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Cristiano Ronaldo 07 from Delhi Public School Panvel, Panvel
Subject :NSO    Class : Class 10

Ans 1:

Cristiano Ronaldo 07 from Delhi Public School Panvel, Panvel
Class : Class 5
C.Both

Ans 2:

Aadya Jha from dps, noida
Class : Class 5
a

Ans 3:

Anvesha Dubey from Lodha World School , Dombivali
Class : Class 5
The chicken was born first. Because the formation of egg shell relies upon a protein found only in the chicken's ovaries. Hope you found the answer to your question

Ans 4:

Soorya Tej R from Delhi Public School, Hyderabad
Class : Class 4
bOTH

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Sehaj singh Sidhu from TMSB, Bathinda
Subject :NSO    Class : Class 8

Ans 1:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8
Correct option is A

Ans 2:

TARUN from DAV, DHANBAD
Class : Class 8
Ans.- (A) Gravity always accelerates any body's speed when it is coming towards the earth. g = 9.8 m/s^2

Ans 3:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8
Correct option is A

Ans 4:

midhuna from ABCD, Hyderabad
Class : Class 8

Ans 5:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8

Post Your Answer

Arjun Gourineni from CHIREC International School, Hyderabad
Subject :NSO    Class : Class 2

Ans 1:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is A


Ans 3:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7

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Parijat Majumdar from Salt Lake School, Kolkata
Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B

The gas having lowest boiling point i.e., highly volatile will be distilled out first and the gas having highest boiling point i.e., least volatile will be distilled out at the last. So, the correct order of gases distilling out is neon, nitrogen, oxygen, krypton.


Ans 2:

Yash from Bharat vidalaya , Buldhana
Class : Class 9
Option b

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Ananya from GIIS International school, Pune
Subject :NSO    Class : Class 3

Ans 1:

Abhijay Saha from Delhi Public School, Megacity, Kolkata
Class : Class 3

Ans 2:

priyank from DAV SCHOOL, Cuttack
Class : Class 7
not understanded

Ans 3:

Ahaan Chaudhary from DPS Noida Sector- 30, Noida
Class : Class 5
Can't understand question.....

Ans 4:

Diya Jasmina from Samsidh MLZS, Bengaluru
Class : Class 4

Ans 5:

Abhijay Saha from Delhi Public School, Megacity, Kolkata
Class : Class 3

Ans 6:

Abhijay Saha from Delhi Public School, Megacity, Kolkata
Class : Class 3
I don't understand this question..!!

Ans 7:

HANAN FAISAL from GLOBAL INDIAN INTERNATIONAL SCHOOL, Abudhabi UAE
Class : Class 4

Ans 8: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is B

Here forces X, Y and Z are Friction, Magnetic force and Gravitational force. It is friction which opposes or slows down moving objects


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Urvee Sarang Gokhale from Sri Sri Ravi Shankar Vidya Mandir, Pune
Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Dung beetle is a helpful insect that helps in dispersing dung


Ans 2:

John Mathew from Somerville School, Delhi
Class : Class 7
The Correct answer is A dungbeetles, as they help us in removing dung from the road

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