National Science Olympiad Forum By SOF Olympiad Trainer - Page 448
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Prashant mishra from Kv Malleshwaram, Bengaluru
Subject :NSO    Class : Class 7

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ARCHISHA SIKDAR from CHOITHRAM MANIKBAG, INDORE
Subject :NSO    Class : Class 5

Ans 1:

Mehar from NCS, Vasco
Class : Class 5
D

Ans 2:

Anjisha Chakraborty from Mount Litera Zee School, Jabalpur
Class : Class 5
Correct answer - D as Uranus has methane in its atmosphere and Mars has iron dust in the soil

Ans 3:

Anjisha Chakraborty from Mount Litera Zee School, Jabalpur
Class : Class 5
Correct answer - D as Uranus has methane in its atmosphere and Mars has iron dust in the soil

Ans 4:

Cheshika batra from Our lady of Fatima convent school, Patiala
Class : Class 5
C

Ans 5:

Shriya Ghosh from Hariyana vidya mandir , Kolkata
Class : Class 5

Ans 6:

Anjisha Chakraborty from Mount Litera Zee School, Jabalpur
Class : Class 5
Correct answer - D as Uranus has methane in its atmosphere and Mars has iron dust in the soil

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harsh from saint pauls, jaipur
Subject :NSO    Class : Class 5

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mystic bro7pro from arbor school, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Mukta Pundir from ,
Class : Class 7
Guys plz don’t confuse co2 with o2. Also it is c as nitrogen isn’t there. Also d is not ordered correctly

Ans 2:

Vaibhav Elisetti from sri chaitanya techno school Nallagandla, Hyderabad
Class : Class 7
the ans is B

Ans 3:

Akshansh Sharma from St Kabir Public School, Chandigarh
Class : Class 5
good

Ans 4:

Cheshika batra from Our lady of Fatima convent school, Patiala
Class : Class 5
B

Ans 5:

Ramya Bn from Ryan International school, Bangalore
Class : Class 6

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Arpan A Shettihalli from APS Public School, BENGALURU
Subject :NSO    Class : Class 7

Ans 1:

Arpan A Shettihalli from APS Public School, BENGALURU
Class : Class 7

Ans 2:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Class : Class 10
IT IS NOT CLEAR CAN SOMEONE EXPLAIN???

Ans 3:

Midhuna from ABCD, Banglore
Class : Class 3
not clear plz explain.aNYbODY hOMe

Ans 4:

Shreyanka ghosh from Don Bosco Park Circus, Kolkata
Class : Class 9
not clear

Ans 5:

Sourasis kundu from St.agnes higher secondary School, Kharagpur
Class : Class 6
study more books

Ans 6:

dhairya mittal from vidyashram international school jodhpur, Jodhpur
Class : Class 5
Not clear

Ans 7:

Mayank Mili from Delhi Public School, Golaghat
Class : Class 9
answer is D

Ans 8:

Tanushree from Asian International School, Colombo
Class : Class 7
Can someone explain why??🤔

Ans 9:

Aadvik saini from Mvn sector 17, Faridabad
Class : Class 8
I cannot understand it

Ans 10:

Akshat Ghosh from HXLS, Gurgaon
Class : Class 5

Ans 11:

Mayank Mili from Delhi Public School, Golaghat
Class : Class 9

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indranil batabyal from st michael school, bankura
Subject :NSO    Class : Class 7

Ans 1:

chaitanya gupta from KANHA MAKHAN MILLENIUM SCHOOL, MATHURA
Class : Class 7

Ans 2:

Viraj Chauhan from Air Force Bal Bharati School, New Delhi
Class : Class 7
Here, we can see that there are 4 beakers of same length but different widths. So, we can conclude that the widest beaker (beaker-2) has the most water as it will have biggest volume, and the least wide beaker (beaker-3) has the least water as it will have lower volume. Now, when 100 gm of ice is added to all the beakers, ofcourse the beaker with the least volume will cool down first as heat exchange will be least. Now let's see the statements: A- No, beaker-2 has the most water making bigger heat exchange hence it would take most time to cool down. B- No, there is very less water for heat exchange hence ice will melt very late in beaker-2. C- No, there are different amounts of water in all beakers so this is incorrect. D- Yes, it has the least water hence it will cool down fast and more. Correct answer- D.

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jamuna pandian from TVS matriculation , MADURAI
Subject :NSO    Class : Class 3

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Tejas Kapoor from Vissanji Academy, Mumbai
Subject :NSO    Class : Class 5

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Chandreyee from BGKV, Kolkata
Subject :NSO    Class : Class 10

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Sarisha Agarwala from dhirubhai ambani international school, Mumbai
Subject :NSO    Class : Class 7

Ans 1:

Amogh from Sindhi High School, Bangalore
Class : Class 7
yes

Ans 2:

from Podar International School,Dhule, Dhule
Class : Class 8
answer should be option a . Baking Soda is used to neutralize forming acid

Ans 3:

soumil srivastava from dps, paradip
Class : Class 9
your answer is wrong baking soda neutralize forming acid

Ans 4:

Aditi Anurag from RBK Kanakia School, Thane
Class : Class 8
The answer is option A as baking soda neutralizes the effect of the formic acid

Ans 5:

Bhargavi from bvb, Pune
Class : Class 7
yes

Ans 6:

Dhruva from VSSIPS, Bangalore
Class : Class 7
The answer has to be option A

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