National Science Olympiad Forum By SOF Olympiad Trainer - Page 448
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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:

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

Ans 2:

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

Ans 3:

Bhargavi from bvb, Pune
Class : Class 7
yes

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:

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

Ans 6:

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

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divanshi from sacred heart convent school, barnala
Subject :NSO    Class : Class 9

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Alvin Anto Ambooken from Stfrancisicse, Bangalore
Subject :NSO    Class : Class 3

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Shreetej from Pearson public school, Pune
Subject :NSO    Class : Class 5

Ans 1:

Pracheta Satapathy from Cygnet Public school, Pune
Class : Class 6
answer option(d)ie H

Ans 2:

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

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Manav from TFS Gunjur, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

SAI KRISHNA from SHISHYA BEML PUBLIC SCHOOL, BANGALORE
Class : Class 3

Ans 2:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
B

Ans 3:

PRACHURJYA GOGOI from Carmel School, Jorhat
Class : Class 3
B

Ans 4:

Sonal from Vibgyor , Gujarat
Class : Class 5
A

Ans 5:

bswarajya from Mount Litera Zee School, Bengaluru
Class : Class 5
B-green leafy vegetables

Ans 6:

Devabhrith from Delhi Public School Electronic City Bangalore, Bengaluru
Class : Class 8
A . cereals , potatoes

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Deepak Vijayaragavan from Greenwood High, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
D

Ans 2:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA
Class : Class 4
D

Ans 3:

Siddharth Laxmisha from The Study Lecole Internationale, PUDUCHERRY
Class : Class 8
Answer is D as both precipitation and condensation are involved in formation of dew in humid nights. The water vapor condenses to form clouds. But, if precipitation was not there, the dew would have remained in the clouds! So, precipitation is also involved in formation of dew on humid nights. Q and R are condensation and precipitation respectively. Thus, the answer is D(condensation and precipitation) and not B(only condensation).

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