National Science Olympiad Forum By SOF Olympiad Trainer - Page 650
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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:

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 2:

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

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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

Ans 7:

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 8:

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 9:

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

Ans 10:

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

Ans 11:

Prabhav Kaushik from DPS Noida, Noida
Class : Class 10

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from ,
Subject :NSO    Class : Class 10

Ans 1:

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

Ans 2:

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

Ans 3:

from ,
Class :
a

Ans 4:

from ,
Class :
C.Both

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from ,
Subject :NSO    Class : Class 8

Ans 1:

from ,
Class :
Correct option is A

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:

from ,
Class :

Ans 5:

midhuna from ABCD, Hyderabad
Class : Class 10

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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:

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

Ans 3: (Master Answer)

from ,
Class :

The correct answer is A


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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:

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

Ans 2:

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

Ans 3:

Diya Jasmina from Samsidh MLZS, Bengaluru
Class : Class 4

Ans 4: (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 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

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

Ans 1: (Master Answer)

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Class :

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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from ,
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

from ,
Class :

Ans 2:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 9
KINDLY LEARN ENGLISH GRAMMAR FIRST

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SRIJA SRINIVASAN PAKU from KENDRIYA VIDHYALAYA ASHOK NAGAR, Chennai
Subject :NSO    Class : Class 5

Ans 1:

Ybbn from Alphabet International School, Chennai
Class : Class 4
It is either option C or option B! SO WHOEVER PUT OPTION C IS ALSO CORRECT !

Ans 2:

Preeti tanwar from DON BOSCO ACADEMY, Patna
Class : Class 9
c

Ans 3:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
DBACGBANGGFCDGDAAJNNC

Ans 4:

from ,
Class :
C

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