National Science Olympiad Forum By SOF Olympiad Trainer - Page 641

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
Plug key is also a type of switch.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Ya, filtration can also remove insoluble impurities but in this case sedimentation and decanation is more appropriate answer.

Ans 2:

Class : Class 10
c

Ans 3:

Class : Class 10
Yes, but in the given figure it is sedimentation

Ans 4:

Class : Class 5
sedimentation and decantation is the answer . but filtration can not come because we can see in the picture itself that the particles are big ,that's why sedimentation and decantation . if the particles are small but yet insoluble , then only it is filtration . I hope that you understood.

Ans 5:

Class : Class 9
it needs to be sedimentation and decantation because the insoluble material present in the liquid is quite heavy you only perform filtration when the particles float over the surface of the water

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
every single sound has its own secondary waves, so the correct option must be option C.

Ans 2:

Class : Class 7
correct option is c

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8

Ans 3:

Class : Class 5

Ans 4:

Class : Class 8
Actually, the solution is opposite to the correct answer

Ans 5:

Class : Class 9

Ans 6:

Class : Class 9

Ans 7:

Class : Class 8
Hi, the statement 2 is true but just tells about the type type combustion to which the reaction given in statement belong. it does not tell about actual cause of burning of phosphorus in air at room temperature. the reason for statement 1 is that phosphorus is a highly reactive element that's why burns in air at room temperature.

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8

Ans 3:

Class : Class 9
Both Wheat and Maize require rotation of crops.

Ans 4:

Class : Class 9
Supposed to be only ABecause mustard is a non leguminous plantEven it can be rotated with soyabean

Ans 5:

Class : Class 8
Why so? In both the cases soybean is present.

Ans 6:

Class : Class 6
yeah right Triguna!!! in both cases soybean is present? why so?

Ans 7:

Class : Class 8
The protein requirement of mustard is fulfilled by the ribozome present in root nodules of soyabean?

Ans 8:

Class : Class 8
Think in the way of leguminous crops

Ans 9:

Class : Class 9

Ans 10:

Class : Class 8

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
options are missing

Ans 2:

Class : Class 10
no options

Ans 3:

Class : Class 9
they didnt give the options

Ans 4:

Class : Class 7
my laptop din't provide the options

Ans 5:

Class : Class 9

Ans 6:

Class : Class 6
they should be more careful

Ans 7:

Class : Class 10
NO OPYIONS!

Ans 8:

Class : Class 7
Want option!

Ans 9:

Class : Class 9

Ans 10:

Class : Class 9
they did not give options

Ans 11:

Class : Class 10
I got the question with the options in my laptop. For those who did not get the options : it is the website's fault

Ans 12:

Class : Class 6
The shadow will be whole black as the book is an opaque object and will not allow any light to pass through it so on the screen it will form a shadow. And the rest that is the ring, no light will reach it thus how can its shadow be formed?

Ans 13:

Class : Class 8
they didn't give the options to my computer

Ans 14:

Class : Class 6
No options

Ans 15:

Class : Class 7
They didn't give options

Ans 16:

Class : Class 6
They did not give options on my ipad .

Ans 17:

Class : Class 10
They did not give options so that is why it went wrong. these kind of incidents happen very frequently in SOF

Ans 18:

Class : Class 6
they MUST and SHOULD be more CAREFUL. No options??? Then, how should we answer their question??? they take no actions! look:-a person has commented a year ago but?NO RESPONSE

Ans 19:

Class : Class 6
They're not even giving me options

Ans 20:

Class : Class 7
I typed in c. What is this?

Ans 21:

Class : Class 10
they didn't given on question page so all my friends and I missed that question

Ans 22:

Class : Class 6
They did not provide options on my laptop but option C is correct.

Ans 23:

Class : Class 10
iT IS NOT LAPTOP'S MISTAKE IT IS THE WEBSITE'S MISTAKE ITSELF.

Ans 24:

Class : Class 10
They did not give the options on my iPad so I couldn't see which was the correct ans. something needs to be done about this problem.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 9
the correct answer should be C

Ans 2:

Class : Class 4
c

Ans 3:

Class : Class 7
c and d are both the answers i think

Ans 4:

Class : Class 4

Ans 5:

Class : Class 7
c

Ans 6:

Class : Class 7

Ans 7:

Class : Class 9
I think Dalso

Ans 8:

Class : Class 7

Ans 9:

Class : Class 4
Correct answer is D.Because insectivores plants can photosynthesise.

Ans 10:

Class : Class 6
This is actually multiple Answer Q.It is silly!!!

Ans 11:

Class : Class 8
Correct answer is, C

Ans 12:

Class : Class 7
B C D is the answers

Ans 13:

Class : Class 5
Option D

Ans 14:

Class : Class 10
d

Ans 15:

Class : Class 10
correct ans is C

Ans 16:

Class : Class 5
D is correct

Ans 17:

Class : Class 4
C

Ans 18:

Class : Class 4
ACTUALLY I DISAGREE WTH my PAST SELF SAYING c IT IS d

Ans 19:

Class : Class 9
B,Care correct as they can not do photosynthesis , uses his leaves to catch food

Ans 20:

Class : Class 4
Its just sooo Confusing Tel the logi I dont understand!!

Ans 21:

Class : Class 6
Answer should be C and D.

Ans 22:

Class : Class 7
THE CORRECT ANSWER IS D BECAUSE THEY NEED TO OVERCOME DEFICIENCY OF NITROGEN

Ans 23:

Class : Class 4
Correct answer is C

Ans 24:

Class : Class 6
Yes, it is a multiple answer question.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
U

Ans 2:

Class : Class 3
U

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
option c is correct

Ans 2:

Class : Class 8

Ans 3:

Class : Class 7
Option C is correct

Ans 4:

Class : Class 5
yes. Gauri Singh is right . option c is right .

Ans 5:

Class : Class 10
Option C is right

Ans 6:

Class : Class 6
Answer B is right because if you refer to the 4th grade book, the first point written is to tilt your your head back

Ans 7:

Class : Class 5
On page 75 of "Learning Science for Smarter Life" for class V it is mentioned that person should sit down and lean forward. It also says to pinch the nose.All answer choices of this question are therefore incorrect.

Ans 8:

Class : Class 9
i agree with Gauri Singh and Kashvi Sharma

Ans 9:

Class : Class 6
option b is correct because by sitting with his head facing up wards would take the blood flow downside

Ans 10:

Class : Class 9
Yes,In the book it is said that the patient should be made sit and lean forward not backward and patient should be told to pinch the sides of the nose together. So the answer should be C.

Ans 11:

Class : Class 5
option c is correct

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 2:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 3:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 4:

Class : Class 6
The answer is A. You should Read the book twice again. But even then also you think that the answer is B than the book is a spam. Adaptation is the permanent feature of an organism which helps it to survive in its habitat, while acclimatisation is a temprory feature or change in feature of an organism which helps it to survive in any other place rather than its habitat......................................................................

Ans 5:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 6:

Class : Class 4
Acclimatization and adaptation mean two totally different things. Adaptation means permanent adjustment to our habitat whereas acclimatization means temporary adjustment to a place where we temporarily stay for some time and get used to. In my opinion, option A is the right answer.

Ans 7:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 8:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 9:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 10:

Class : Class 8
the answer should "a" as acclimatisation not adaptation

Ans 11:

Class : Class 4

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