National Science Olympiad Forum By SOF Olympiad Trainer - Page 463

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
Thanks

Ans 2:

Class : Class 6
The answer is D as 1.Rusting Is slow change as it takes a long time for Iron to rust.2.Rusting Is also a chemical change as many chemical reactions occur in The Rusting process 3.Rusting is a Irreversible change as we can not change the effect of rustingThank youI hope I proved to be some help

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
It's incorrect

Ans 2:

Class : Class 6

Ans 3:

Class : Class 7
don't protest

Ans 4:

Class : Class 8
Actually the image shown of knee is resembling to shoulder bones that's why its so confusing

Ans 5:

Class : Class 8
When u know all the answers then what is the need to ask us??

Ans 6:

Class : Class 4
Very confusing.

Ans 7:

Class : Class 7
P shows the knee joint. The knee joint is a hinge joint, which allows movement along one axis only, to flex or to extend.Q shows a joint where our neck joins the head. It is a pivotal joint. It allows us to bend our head forward and backward and turn the head to our right or left.Now, let’s check the given options and find the incorrect one regarding these two joints:A. Joint P allows movement in one direction only. ----- Correct. Joint P is a hinge joint, which allows movement along one axis only, to flex or to extend.B. Joint Q allows movement in many planes. ----- Correct. Joint Q allows us to bend our head forward and backward and turn the head to our right or left.C. Knee bones have two P joints. ----- Incorrect. Knee bones have just one hinge joint.D. Joint Q acts like a pivot and allows the circular motion of the part around it. ----- Correct. We can move our head around in circular motion at the neck joint.Hence, Option C is the right answer.

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Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Class : Class 1

Ans 2:

Class : Class 8
No, it's d

Ans 3:

Class : Class 6
it should be c. how can it be d as it is hollow at the center?

Ans 4:

Class : Class 6
The answer should be D as all the options except D have a circular point.metal rings also have circle shape for fitting of fingers but they are hollow and let Light pass through it and as we know Light only passes through Opaque objects.

Ans 5:

Class : Class 6
Logically it should be C

Ans 6:

Class : Class 6
Ans from the question is wrong. the hollow part will allow light to pass and thus the given shadow will not be formed

Ans 7:

Class : Class 7
wow

Ans 8:

Class : Class 6
the answer according to the question is wrong

Ans 9:

Class : Class 7
From the image, we can say that the image is formed by a round opaque object. Now, let’s check the following objects and find the one which will not form the above shadow:A. An egg ----- An egg is oval in shape, but if the source of light is placed at either of the ends, the shadow formed would be round.B. A vase ----- A vase can have any size and shape, but usually a regular vase has rounded edges. So, if source of light is placed at either of the ends, the shadow formed would be round.C. A cone ----- A cone has a pointed end, and a flat rounded end. So, if a source of light is placed at either of the ends, the shadow formed would be round.D. A metal ring ----- A metal ring is round, but hollow in between, so light would pass through the central part. So, the shadow formed by the ring will be a round hollow.Hence, the right answer is Option D.

Ans 10:

Class : Class 6
It will be D !!!!!!!!!!

Ans 11:

Class : Class 8

Ans 12:

Class : Class 8
it!!!!!!!!!!! is!!!!!!!!!! ddddddddddddddddddddddd!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 13:

Class : Class 10
The answer is D.

Ans 14:

Class : Class 3
NO !!!!!! THE ANS IS C!!!!

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 1
the answer is B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
shouldn;t the correct ans be B?

Ans 2:

Class : Class 10
C is the correct option as it is saying what is used for 'agriculture'

Ans 3:

Class : Class 9

Ans 4:

Class : Class 6
Think the the option should be (b)

Ans 5:

Class : Class 7
Seed drill is a tool used for sowing seeds in agriculture. It has a funnel shaped part where seeds are put in. These seeds are buried deep in the soil through hollow pipes.So b is the answer

Ans 6:

Class : Class 8

Ans 7:

Class : Class 7

Ans 8:

Class : Class 8
B is the answer

Ans 9:

Class : Class 5
Both fern and mushroom have spores.Both A and B can be correct

Ans 10:

Class : Class 7
B is the answer to this question but it is showing C as correct option

Ans 11:

Class : Class 5
It should be B

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10
WHY DISTILLATION METHOD FOR SEPARATION OF TWO IMMISCIBLE LIQUID IS WRONG?

Ans 2:

Class : Class 6
WHY DISTILLATION SEPERATION PART WRONG?

Ans 3:

Class : Class 8
Distillation can also be used. It is also correctThe answer is incorrect

Ans 4:

Class : Class 10

Ans 5:

Class : Class 7
Correct answer is D, As distillation process is used to separate immiscible liquids as both have different boiling points.

Ans 6:

Class : Class 10

Ans 7:

Class : Class 1
the answer is C!!!!!!!!!!!!!!!!

Ans 8:

Class : Class 7
Distillation can also be usedthe ans C is correct

Ans 9:

Class : Class 7
Wrong answer

Ans 10:

Class : Class 7
Why is the distillation method wrong?? It should be correct!! The answer should be D!!

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
answer is b

Ans 2:

Class : Class 1
diamond is a non conducter

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