National Science Olympiad Forum By SOF Olympiad Trainer - Page 693

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 8
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 3:

Class : Class 9
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 4:

Class : Class 5
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Ans 5:

Class : Class 4

Ans 6:

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.

Ans 7:

Class : Class 4
The answer is C

Ans 8:

Class : Class 3
The correct answer is c

Ans 9:

Class : Class 5
C

Ans 10: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 11:

Class : Class 4
the correct answer is C

Ans 12:

Class : Class 6

Ans 13:

Class : Class 7
correct answer is C

Ans 14:

Class : Class 4
ans is c

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 8
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 8
ans is A as the order of gases will not change

Ans 5:

Class : Class 3
We Don't know that plants breath oxygen in night

Ans 6:

Class : Class 5
A

Ans 7:

Class : Class 7

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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 6
why?

Ans 3:

Class : Class 9

Ans 4:

Class : Class 7

Ans 5:

Class : Class 7

Ans 6:

Class : Class 9
why

Ans 7:

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

Ans 8:

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 9:

Class : Class 9
ANS should be a

Ans 10:

Class : Class 3
nonsense question

Ans 11:

Class : Class 9
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 12:

Class : Class 3
understood

Ans 13:

Class : Class 8

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
I. This is so EZ.t can be c as N is on the top and S is down plus when the north recives cold it is hot in the south and when the south is cold it is hot in the north

Ans 2:

Class : Class 9
The answer is C

Ans 3:

Class : Class 5
C

Ans 4:

Class : Class 4
no u DUMMIES! winter should be on the east side of the earth and summer on the west and Goutham this question is sooooo WRONG! and ur wrong Goutham

Ans 5: (Master Answer)

Class : Class 1

The correct answer is C.


Ans 6:

Class : Class 9
C

Ans 7:

Class : Class 4
explain please

Ans 8:

Class : Class 5
please explain how is it c?

Ans 9:

Class : Class 4
D is correct

Ans 10:

Class : Class 7
correct answer is C

Ans 11:

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

Ans 12:

Class : Class 6
C

Ans 13:

Class : Class 6
d

Ans 14:

Class : Class 7
please give explanation Admin.

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Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 10
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 4:

Class : Class 7
WTH?

Ans 5:

Class : Class 8
good question sligjhtly tricky

Ans 6:

Class : Class 8
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 7:

Class : Class 8
And the question said to find the incorrect option! So a.

Ans 8:

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

Ans 9:

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

Ans 10:

Class : Class 9
I think the answer is A

Ans 11:

Class : Class 4
cool question

Ans 12:

Class : Class 1
The correct ans is A.

Ans 13:

Class : Class 9
It's simple

Ans 14:

Class : Class 4

Ans 15:

Class : Class 5
Nice question

Ans 16:

Class : Class 4
iojkbn

Ans 17:

Class : Class 9

Ans 18:

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

Ans 19:

Class : Class 5

Ans 20:

Class : Class 6
Soumya raj is correct

Ans 21:

Class : Class 5
Correct answer is C

Ans 22:

Class : Class 10
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 23:

Class : Class 9
c

Ans 24:

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

Ans 25:

Class : Class 5

Ans 26:

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 27:

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

Ans 28:

Class : Class 9
OH mene to d kiya tab laga ki sab wrong the.oh my god now acinfusing yar

Ans 29:

Class : Class 6

Ans 30:

Class : Class 9
its a

Ans 31:

Class : Class 7
All of them are incorrect so the answer is D

Ans 32:

Class : Class 4
Answer a

Ans 33:

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

Ans 34:

Class : Class 4
D

Ans 35:

Class : Class 7
But a is the answer .

Ans 36:

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

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

Ans 2:

Class : Class 9
base turns yellow with methyl orange.

Ans 3:

Class : Class 10
i agree@anurag

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
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 2:

Class : Class 9
answer is C

Ans 3:

Class : Class 5
C

Ans 4:

Class : Class 6
d

Ans 5:

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

Ans 6:

Class : Class 7
mo the film will pop so ans is d

Ans 7:

Class : Class 5

Ans 8:

Class : Class 8
ANSWER IS D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
answer can be b

Ans 3:

Class : Class 8
A IS NOT A MIRROR IMAGE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 4:

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

Ans 5:

Class : Class 4
aa

Ans 6:

Class : Class 8
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 7:

Class : Class 8
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 8:

Class : Class 7
A

Ans 9:

Class : Class 5
I Don't Understand?

Ans 10:

Class : Class 5
A is almost a symmetrical figure

Ans 11:

Class : Class 5

Ans 12:

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

Ans 13:

Class : Class 2
C

Ans 14:

Class : Class 8
I don’t understand how can d be the answer

Ans 15:

Class : Class 9

Ans 16:

Class : Class 4
a

Ans 17:

Class : Class 6
A

Ans 18:

Class : Class 5
A

Ans 19:

Class : Class 3

Ans 20:

Class : Class 9

Ans 21:

Class : Class 8
Yes A is not a mirror image SOF change answer

Ans 22:

Class : Class 4
A is not a mirror image

Ans 23:

Class : Class 7

Ans 24:

Class : Class 4

Ans 25:

Class : Class 3

Ans 26:

Class : Class 5
A is not a mirror image. @SOF Please change the answer.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
Second class lever

Ans 2:

Class : Class 9
Second class lever

Ans 3:

Class : Class 4
Second lever

Ans 4:

Class : Class 8
Second class lever.

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