National Science Olympiad Forum By SOF Olympiad Trainer - Page 647
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from ,
Subject :NSO    Class : Class 5

Ans 1:

from ,
Class :
ans is c.

Ans 2:

SANVI ROHILLA from The little shri, Rohtak
Class : Class 5
ANS C

Ans 3:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is C

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from ,
Subject :NSO    Class : Class 6

Ans 1:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 7
(ii) and(iii) are correct whereas the answer to (i) is handpicking and the answer for (iv) is winnowing

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

Aaditya Verma from Mayoor, Noida
Class : Class 8

Ans 6:

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

Ans 7:

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

Ans 8:

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 9:

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 10:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8

Ans 11:

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 12:

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

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:

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 15:

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

Ans 16:

Shreyansh Gupta from MVN, faridabad
Class : Class 7
but 1st option is incorrect?????????????????????

Ans 17:

aarav shankar from st xaviers high school, gurugram
Class : Class 8
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 18:

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 19:

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

Ans 20:

Shreyansh Gupta from MVN, faridabad
Class : Class 7
BRUHHHHHH i got 20/20 in all tests this is more than easy like NSO

Ans 21:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 8
c is correct not b

Ans 22:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 8
B is the answer

Ans 23:

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 24:

Adrija Mishra from SRDAV public school, Delhi
Class : Class 8
i think all are correct, because I am the topper.........

Ans 25:

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

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from ,
Subject :NSO    Class : Class 6

Ans 1:

from ,
Class :
translucent bcz the light is passing partially from the window

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

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

Ans 1:

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

Ans 2:

from ,
Class :
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 3:

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 4:

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

Ans 5:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 10

Ans 6:

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

Ans 7:

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 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:

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

Ans 10:

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

Ans 11:

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

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from ,
Subject :NSO    Class : Class 10

Ans 1:

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

Ans 2:

from ,
Class :
C.Both

Ans 3:

from ,
Class :
a

Ans 4:

from ,
Class :
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

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from ,
Subject :NSO    Class : Class 8

Ans 1:

from ,
Class :

Ans 2:

from ,
Class :
Correct option is A

Ans 3:

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

Ans 4:

midhuna from ABCD, Hyderabad
Class : Class 10

Ans 5:

from ,
Class :
Correct option is A

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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)

from ,
Class :

The correct answer is A


Ans 3:

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

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from ,
Subject :NSO    Class : Class 9

Ans 1:

from ,
Class :
Option b

Ans 2: (Master Answer)

from ,
Class :

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.


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

Ans 1:

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

Ans 2:

Diya Jasmina from Samsidh MLZS, Bengaluru
Class : Class 4

Ans 3:

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

Ans 4:

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

Ans 5: (Master Answer)

from ,
Class :

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


Ans 6:

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

Ans 7:

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

Ans 8:

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

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