National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
correct answer is C

Ans 4:

Class : Class 6
The correct answer is C because if organism X wipes out all tadpoles in the community, then water insects' population grows with nothing to eat them. The small fish die because they have nothing to eat, and soon the big fish die too.

Ans 5:

Class : Class 7
Aarush , there will be not enough plants to feed so many water insects . So, at a particular time all plants will finish . So , there will be nothing left for the water insects so they will also die !

Ans 6:

Class : Class 4

Ans 7:

Class : Class 3
The correct answer is c

Ans 8:

Class : Class 4
In the given food chain, tadpole feeds on water insect and in turn is eaten by small fish. If population of tadpole will decline with time then small fish population will also decrease as former is the food of later. On the other hand, water insect population will be positively affected because in the absence of predator prey population reproduces and flourishes.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5

Ans 2:

Class : Class 3
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 5
A

Ans 5:

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 6:

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

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
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 2:

Class : Class 5
why

Ans 3:

Class : Class 3
ANS should be a

Ans 4:

Class : Class 3
nonsense question

Ans 5:

Class : Class 6
why?

Ans 6:

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

Ans 7:

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

Ans 8:

Class : Class 4

Ans 9:

Class : Class 3

Ans 10:

Class : Class 3
understood

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
correct answer is C

Ans 2:

Class : Class 7
The answer is C

Ans 3:

Class : Class 3
DDDDDDDDDDDDDD

Ans 4:

Class : Class 5
C

Ans 5:

Class : Class 4
C

Ans 6: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 7:

Class : Class 4

Ans 8:

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

Ans 9:

Class : Class 5
C

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
D

Ans 2:

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

Ans 3:

Class : Class 5
its a

Ans 4:

Class : Class 5
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 5:

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

Ans 6:

Class : Class 5

Ans 7:

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

Ans 8:

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

Ans 9:

Class : Class 1
The correct ans is A.

Ans 10:

Class : Class 6
Soumya raj is correct

Ans 11:

Class : Class 4
cool question

Ans 12:

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

Ans 13:

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

Ans 14:

Class : Class 6

Ans 15:

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

Ans 16:

Class : Class 7
But a is the answer .

Ans 17:

Class : Class 4
good question sligjhtly tricky

Ans 18:

Class : Class 4
All of them are incorrect so the answer is D

Ans 19:

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

Ans 20:

Class : Class 7
Answer a

Ans 21:

Class : Class 6
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 22:

Class : Class 6
c

Ans 23:

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 24:

Class : Class 4
iojkbn

Ans 25:

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

Ans 26:

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

Ans 27:

Class : Class 7

Ans 28:

Class : Class 7

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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
C

Ans 2:

Class : Class 5
answer is C

Ans 3:

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

Ans 4:

Class : Class 6
d

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