National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
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 2:

Class : Class 4

Ans 3: (Master Answer)

Class : Class 1
The correct answer is C.

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 3
A

Ans 3:

Class : Class 3

Ans 4:

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.

Post Your Answer

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

Ans 3:

Class : Class 3
nonsense question

Ans 4:

Class : Class 5
why?

Ans 5:

Class : Class 3
understood

Ans 6:

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 7:

Class : Class 5
why

Ans 8:

Class : Class 3

Ans 9:

Class : Class 3
ANS should be a

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 3
C

Ans 2: (Master Answer)

Class : Class 1
The correct answer is C.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

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

Ans 3:

Class : Class 5
But a is the answer .

Ans 4:

Class : Class 7
The correct answer is a but i did it wrong... (i did ans C)

Ans 5:

Class : Class 4
D

Ans 6:

Class : Class 5
correct answer is supposed to be C. But according to SOF it is A.

Ans 7:

Class : Class 5

Ans 8:

Class : Class 6
c

Ans 9:

Class : Class 5
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 10:

Class : Class 5
I did it c but according to SOF, it is a.

Ans 11:

Class : Class 4
good question sligjhtly tricky

Ans 12:

Class : Class 6
Answer a

Ans 13:

Class : Class 6

Ans 14:

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

Ans 15:

Class : Class 4
iojkbn

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
It would be conducted on either 9th or 23rd November. Ask your school Olympiad Coordinator.

Ans 2:

Class : Class 6
It would be conducted on either 9th or 23rd November. Ask your school Olympiad Coordinator.

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
base turns yellow with methyl orange.

Ans 2:

Class : Class 8
I think the answer is C. If it contains H+ ions less than OH- ions, the substance is a base.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
C

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
I don’t understand how can d be the answer

Ans 3:

Class : Class 5

Ans 4:

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

Ans 5:

Class : Class 4

Ans 6:

Class : Class 4
THEY CAN TELL THAT WHICH IS NOT MIRROR IMAGE OR MIRROR IMAGE

Ans 7:

Class : Class 4

Ans 8:

Class : Class 4
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 9:

Class : Class 4
answer can be b

Ans 10:

Class : Class 4
A is almost a symmetrical figure

Ans 11:

Class : Class 3

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
D is the answer.

Ans 2:

Class : Class 4
filtration should be done when there are floating particles. here it should be decantation.

Ans 3:

Class : Class 4
There is a mistake in the question..........the option a and b are repeatedI reported an error on this...

Ans 4:

Class : Class 4
I AGREE THERE IS A MISTAKE BUT THE BEST METHOD IS FILTRATION

Ans 5:

Class : Class 4
C IS THE ANSWER

Ans 6:

Class : Class 4
I think evaporation could solve the problem

Ans 7:

Class : Class 4

Ans 8:

Class : Class 5
Muddy water cannot be clarified by filtration as it contains fine particles such as clay .Sedimentation followed by decantation is the more suitable process for it.

Ans 9:

Class : Class 4
Can you tell the answer of this question

Ans 10:

Class : Class 5
?????????????????????????????????

Ans 11:

Class : Class 4

Post Your Answer