National Science Olympiad Forum By SOF Olympiad Trainer - Page 645

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Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 10
c

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 9

Ans 2:

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.

Ans 3:

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

Ans 4:

Class : Class 8
the soultion is wrong beacuse the literal defination of spontaneous combustion tells us that it happens at room temprature without application of heat by external source

Ans 5:

Class : Class 8

Ans 6:

Class : Class 5

Ans 7:

Class : Class 9

Ans 8:

Class : Class 8

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Think in the way of leguminous crops

Ans 2:

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

Ans 3:

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

Ans 4:

Class : Class 8

Ans 5:

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

Ans 6:

Class : Class 8

Ans 7:

Class : Class 9

Ans 8:

Class : Class 8

Ans 9:

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

Ans 10:

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

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Subject :NSO    Class : Class 6

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 6
they should be more careful

Ans 4:

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

Ans 5:

Class : Class 7
Want option!

Ans 6:

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

Ans 7:

Class : Class 9

Ans 8:

Class : Class 9
they did not give options

Ans 9:

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.

Ans 10:

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 11:

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 12:

Class : Class 6
options are missing

Ans 13:

Class : Class 10
no options

Ans 14:

Class : Class 9

Ans 15:

Class : Class 9
they didnt give the options

Ans 16:

Class : Class 7
They didn't give options

Ans 17:

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 18:

Class : Class 10
NO OPYIONS!

Ans 19:

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 20:

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

Ans 21:

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

Ans 22:

Class : Class 6
No options

Ans 23:

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

Ans 24:

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

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 7

Ans 3:

Class : Class 4
Correct answer is C

Ans 4:

Class : Class 9
B C D is the answers

Ans 5:

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

Ans 6:

Class : Class 10
d

Ans 7:

Class : Class 8
Correct answer is, C

Ans 8:

Class : Class 10
correct ans is C

Ans 9:

Class : Class 4
c

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

Class : Class 9
the correct answer should be C

Ans 15:

Class : Class 4
C

Ans 16:

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

Ans 17:

Class : Class 5
D is correct

Ans 18:

Class : Class 5
Option D

Ans 19:

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

Ans 20:

Class : Class 7
c

Ans 21:

Class : Class 8

Ans 22:

Class : Class 9
I think Dalso

Ans 23:

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

Ans 24:

Class : Class 7
Answer should be C and D.

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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 9
i agree with Gauri Singh and Kashvi Sharma

Ans 2:

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 3:

Class : Class 7
Option C is correct

Ans 4:

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 5:

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

Ans 6:

Class : Class 7
option c is correct

Ans 7:

Class : Class 8

Ans 8:

Class : Class 10
Option C is right

Ans 9:

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 10:

Class : Class 5
option c is correct

Ans 11:

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

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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 8
the answer should "a" as acclimatisation not adaptation

Ans 5:

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 6:

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

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 4

Ans 11:

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......................................................................

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Subject :NSO    Class : Class 5

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