National Science Olympiad Forum By SOF Olympiad Trainer - Page 492

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
OPTION D IS MISSING! IT CAN BE BOTH A

Ans 2:

Class : Class 9

Ans 3:

Class : Class 7
A and B both r correct so they should make option D as both A and B even there is no option D so ya possible

Ans 4:

Class : Class 7
Option D is missing!!! And Option A and B can also be the answer as both of them are correct. The options in the question itself is an error as there is no option D!

Ans 5:

Class : Class 9

Ans 6:

Class : Class 10
I think option d is missing and it might be both a and b as both of them r correct

Ans 7:

Class : Class 4

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
It is very tricky question.

Ans 2:

Class : Class 3
D

Ans 3:

Class : Class 5
it is a piece of cake

Ans 4:

Class : Class 9
The correct answer is D

Ans 5:

Class : Class 7
What a tricky question!

Ans 6:

Class : Class 8
very tricky

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5

Ans 2:

Class : Class 3

Ans 3:

Class : Class 7

Ans 4:

Class : Class 2

Ans 5:

Class : Class 9
D

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
the spi

Ans 2:

Class : Class 3

Ans 3:

Class : Class 5
I think it should be heart not kidney

Ans 4:

Class : Class 3
D

Ans 5:

Class : Class 4
It will be kidney because lungs give out carbon dioxide as waste.Heart is the wrong answer........

Ans 6:

Class : Class 8
i think heart is correct answer. please elaborate, how come kidney is right answer a

Ans 7:

Class : Class 5

Ans 8:

Class : Class 3
Heart is the correct answer

Ans 9:

Class : Class 5
Answer is D because both lungs n kidney are in Exetery system

Ans 10:

Class : Class 3
I think both kidneys and hearth are correct. beacause lungs are in respiratory,curculatory and excretory system as they help us to brathe ,make pure blood and also the blood goes from hearth then lungs and then all parts. Plese tell how hearth is wrone.

Ans 11:

Class : Class 6
Heart

Ans 12:

Class : Class 8
D because spinal cord helps brain to control the body.

Ans 13:

Class : Class 5
spinal cord connects every organ to brain an

Ans 14:

Class : Class 3
I think option a is also correct with option d as lungs are in curcularury system system too as the blood first goes to the lungs after the heath and then the body. Lungs also filter air and help us breathe so they are in excretory and resperatory system too. Plese tell how option a hearth is wrong .

Ans 15:

Class : Class 3
i think brain n spinal cord are parts of nervous system whereas kidneys n lungs are part of excretory system,through lungs we inhale o2 n exhale co2,kidneys excrete urines

Ans 16:

Class : Class 6
I thinks it should be heart. As lungs are connected with the heart not kidney.

Ans 17:

Class : Class 6
lungs and spinal cords are part of nervous system so lungs and kidney are part of excretory system(lungs dispose co2 from body)

Ans 18:

Class : Class 3

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
use your brain bro

Ans 2:

Class : Class 5
You can earn badges by studying hard in sof , like doing tests, previous year papers, mock tests, etc.

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Please explain your answer. I am really confused.@UTKARSH SAWARN

Ans 2:

Class : Class 8
IN MY OPINION OPTION C IS THE CORRECT ANSWER

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
why not option c?

Ans 2:

Class : Class 7

Ans 3:

Class : Class 8
@bhagyesh .As metal rod or electroscope is positively charged all the currents flown to the object will be positive and the leaves will repel each other

Ans 4:

Class : Class 1
@Bhagyesh You need to use your

Ans 5:

Class : Class 1

Ans 6:

Class : Class 1
@Bhagyesh You need to use your brain and do it with your hands. Simple. @Raavi no need of that big thingy

Ans 7:

Class : Class 8

Ans 8:

Class : Class 8
option a

Ans 9:

Class : Class 8
This is wrong. The answer should be C, due to induction. The positive charges move to the bottom as they repel, while the negative particles should move to the top, as they are attracted to the positive particles in the bar.

Ans 10:

Class : Class 8
option a

Ans 11:

Class : Class 7
I don't understand tbh

Ans 12:

Class : Class 7

Ans 13:

Class : Class 4
how priyanka

Ans 14:

Class : Class 8
how to do it

Ans 15:

Class : Class 7

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