National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
We Don't know that plants breath oxygen in night

Ans 2:

Class : Class 4
Sorry ,answer is A .I gave wrong explanation why .You have told arerespectively, so gas 1 is carbon dioxide and gas 2 is oxygen.You have given the order as 1 and 2 i.e. carbon dioxide and oxygen.So ,we will say it as 2 and 1 i.e oxygen and carbon dioxide .Hence answer is A.

Ans 3:

Class : Class 3
Answer is D because at night plants take in oxygen and give out carbon-di-oxide whereas we humans always take in oxygen and give out carbon-di-oxide.

Ans 4:

Class : Class 4
ans is A as the order of gases will not change

Ans 5:

Class : Class 5
A

Ans 6:

Class : Class 5

Ans 7:

Class : Class 3
A

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
i cant understand the second question c] or b]?

Ans 2:

Class : Class 3
nonsense question

Ans 3:

Class : Class 3
understood

Ans 4:

Class : Class 3
Answer is asymmetrical figure, because all the other figures are symmetrical.

Ans 5:

Class : Class 5
why

Ans 6:

Class : Class 5
ANS should be a

Ans 7:

Class : Class 5
The images given in Options A, B and D are symmetrical images. That means all three have at least one line of symmetry. Line of symmetry is any line drawn through the image which divides the image into two exactly equal parts, and these parts are mirror images of each other. A.The part above the red line (line of symmetry) and the 7part below the red line are mirror images of each other.7410`1 B.The parts on both sides of the red line (line of symmetry) are mirror images of each other. C.There can be no line of symmetry that can divide this image into two equal parts which are mirror images of each other. D.The part on the left side of the red line (line of symmetry) and the part on the right side of the red line are mirror images of each other. Hence, Option C is the odd one out.

Ans 8:

Class : Class 4

Ans 9:

Class : Class 4

Ans 10:

Class : Class 6
why?

Ans 11:

Class : Class 5

Ans 12:

Class : Class 5

Ans 13:

Class : Class 4
Figure A can be folded horizontally, figure B can be folded diagonally, figure D can be folded vertically to get their mirror images whereas figure C is asymmetric, so the odd one out is figure C

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
d

Ans 2:

Class : Class 5
DDDDDDDDDDDDDD

Ans 3:

Class : Class 6
C

Ans 4: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 5:

Class : Class 5
C

Ans 6:

Class : Class 8
The answer is C

Ans 7:

Class : Class 5
how do you all know the correct answer is 'C' when everything seems correct.

Ans 8:

Class : Class 5
C

Ans 9:

Class : Class 5

Ans 10:

Class : Class 4
correct answer is C

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
The question is asking to select the incorrect question, but option C is correct and option A is wrong so A is the correct answer

Ans 2:

Class : Class 1
The correct ans is A.

Ans 3:

Class : Class 5
The correct answer is A) according to SOF

Ans 4:

Class : Class 5
Soumya raj is correct answer should be c as ball and socket joint is only found in legs and arms and it is definitely not found in the skull .

Ans 5:

Class : Class 5
its a

Ans 6:

Class : Class 4
iojkbn

Ans 7:

Class : Class 6
All of them are incorrect so the answer is D

Ans 8:

Class : Class 7
But a is the answer .

Ans 9:

Class : Class 8
It's simple

Ans 10:

Class : Class 8
I think the answer is A

Ans 11:

Class : Class 4
D

Ans 12:

Class : Class 6

Ans 13:

Class : Class 6
correct answer is supposed to be C. But according to SOF it is A.

Ans 14:

Class : Class 5
actually the picture P is wrong . they want to express it as pivot joint.

Ans 15:

Class : Class 2
Answer a

Ans 16:

Class : Class 6
Soumya raj is correct

Ans 17:

Class : Class 5
but read the question... you have to select the incorrect ans

Ans 18:

Class : Class 4
cool question

Ans 19:

Class : Class 5

Ans 20:

Class : Class 6
EASY. It is a). FOund it very quickly. I wonder why many of you put c)

Ans 21:

Class : Class 5
the answer is a but i did it c

Ans 22:

Class : Class 9
c

Ans 23:

Class : Class 4
good question sligjhtly tricky

Ans 24:

Class : Class 7

Ans 25:

Class : Class 4
p is not pivot joint but a ball and socket joint but according to me c is the correct ans

Ans 26:

Class : Class 6
Yes, it is true, we can compare the movement to the joint mentioned as "P" with that of a joystick. It is a ball-socket joint, and it is found in the shoulders and the hips.

Ans 27:

Class : Class 7
SOF is wrong . The answer should be C as Ball and socket joint is only found in arms and legs . It cannot come in the skull . Smita De is also absolutely right .

Ans 28:

Class : Class 7
I did it c but according to SOF, it is a.

Ans 29:

Class : Class 5
OH mene to d kiya tab laga ki sab wrong the.oh my god now acinfusing yar

Ans 30:

Class : Class 8

Ans 31:

Class : Class 8
The correct answer is a but i did it wrong... (i did ans C)

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
It would be conducted on either 9th or 23rd November. Ask your school Olympiad Coordinator.

Ans 2:

Class : Class 7
It would be conducted on either 9th or 23rd November. Ask your school Olympiad Coordinator.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
base turns yellow with methyl orange.

Ans 2:

Class : Class 9
I think the answer is C. If it contains H+ ions less than OH- ions, the substance is a base.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
ANSWER IS D

Ans 2:

Class : Class 6
d

Ans 3:

Class : Class 5
a b c d e f g h i j k l m n o p q r s t u v w x y z.......... Confusing .......... z y x w v u t s r q p o n m l k j i h g f e d c b a

Ans 4:

Class : Class 6
Option DThe film of soapy water will burst as the water will get evaporated........

Ans 5:

Class : Class 5
answer is C

Ans 6:

Class : Class 5
C

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
In A the mirror image of B is wrong and in D it is not a mirror image.In fact A and D both are not mirror images .Hence, the confusion between A and D

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
A

Ans 4:

Class : Class 4
Yes A is not a mirror image SOF change answer

Ans 5:

Class : Class 4
aa

Ans 6:

Class : Class 5
answer can be b

Ans 7:

Class : Class 3

Ans 8:

Class : Class 4

Ans 9:

Class : Class 4
A

Ans 10:

Class : Class 4
A

Ans 11:

Class : Class 5

Ans 12:

Class : Class 4
A IS NOT A MIRROR IMAGE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 13:

Class : Class 7

Ans 14:

Class : Class 4
A is not a mirror image

Ans 15:

Class : Class 9
I don’t understand how can d be the answer

Ans 16:

Class : Class 6
They were trying to show the mirror image but OptionA is not shown correctly as the mirror image. Hence the confusion. between A and D.

Ans 17:

Class : Class 5

Ans 18:

Class : Class 4

Ans 19:

Class : Class 5
A is not a mirror image. Requesting SOF to correct the same.

Ans 20:

Class : Class 4

Ans 21:

Class : Class 5
THEY CAN TELL THAT WHICH IS NOT MIRROR IMAGE OR MIRROR IMAGE

Ans 22:

Class : Class 5
A is almost a symmetrical figure

Ans 23:

Class : Class 4
a

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
Second class lever.