National Science Olympiad Forum By SOF Olympiad Trainer - Page 491

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9

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

Ans 5:

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

Ans 6:

Class : Class 4

Ans 7:

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!

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
D

Ans 2:

Class : Class 9
The correct answer is D

Ans 3:

Class : Class 8
very tricky

Ans 4:

Class : Class 7
What a tricky question!

Ans 5:

Class : Class 5
It is very tricky question.

Ans 6:

Class : Class 5
it is a piece of cake

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5

Ans 2:

Class : Class 9
D

Ans 3:

Class : Class 3

Ans 4:

Class : Class 7

Ans 5:

Class : Class 2

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

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

Ans 2:

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

Ans 3:

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 4:

Class : Class 3
D

Ans 5:

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 6:

Class : Class 6
Heart

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

Class : Class 3

Ans 11:

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 12:

Class : Class 5

Ans 13:

Class : Class 5
the spi

Ans 14:

Class : Class 3
Heart is the correct answer

Ans 15:

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

Ans 16:

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 17:

Class : Class 3

Ans 18:

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

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Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 8
use your brain bro

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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
I don't understand tbh

Ans 2:

Class : Class 4
how priyanka

Ans 3:

Class : Class 1

Ans 4:

Class : Class 7

Ans 5:

Class : Class 1
@Bhagyesh You need to use your

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
option a

Ans 8:

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 9:

Class : Class 7

Ans 10:

Class : Class 7

Ans 11:

Class : Class 8
how to do it

Ans 12:

Class : Class 8
option a

Ans 13:

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 14:

Class : Class 7
why not option c?

Ans 15:

Class : Class 8

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