National Science Olympiad Forum By SOF Olympiad Trainer - Page 519

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5

Ans 2:

Class : Class 3

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
What the heck is going on.

Ans 2:

Class : Class 4

Ans 3:

Class : Class 10
NA means 'No Answer'.But the guidelines clearly state 'Mark all questions.'How is this fair?

Ans 4:

Class : Class 8
Please give the answer to this Question.

Ans 5:

Class : Class 8
Arrows are marked wrongly...I dont think these mistakes will ever get rectified considering that people have been writing in this forum, for the past two years, for this question. please look into this sof🙂

Ans 6:

Class : Class 9
Please explain what NA is... I don't understand

Ans 7:

Class : Class 9
None of the given options are correct...

Ans 8:

Class : Class 9
What 'NA' ? The question itself is incorrect

Ans 9:

Class : Class 7
what does NA mean?

Ans 10:

Class : Class 8
What do you mean by 'NA'?

Ans 11:

Class : Class 8

Ans 12:

Class : Class 6

Ans 13:

Class : Class 9
I understood that when I looked at the question itselfThe arrows are wrongly labelled

Ans 14:

Class : Class 7

Ans 15:

Class : Class 8
Woah how are the marks out of 60 then. People have already attempted this paper in the given year. This means an error in the paper was there that wasn't rectified...

Ans 16:

Class : Class 9
EXPLAIN THIS PLEASEQuestion is incorrect but even after 30 (31) posts and queries no corrections...

Ans 17:

Class : Class 9
Please explain the answer

Ans 18:

Class : Class 10

Ans 19:

Class : Class 5
NA means no answer but what we had to do with it

Ans 20:

Class : Class 8
Yes , NA means 'no answer' So , since there is no such option , anything we pick would be incorrect.

Ans 21:

Class : Class 9
The correct answer will be(a)

Ans 22:

Class : Class 9
"NA"?.please explain the answer

Ans 23:

Class : Class 10

Ans 24:

Class : Class 7
if there is no answer,then why was it considered wrong?it is not fair.

Ans 25:

Class : Class 8
Exactly.What does NA mean ??

Ans 26:

Class : Class 8
PLEASE GIVE THE ANSWER ALONG WITH EXPLANTION

Ans 27:

Class : Class 8

Ans 28:

Class : Class 9

Ans 29:

Class : Class 9
why no reply...

Ans 30:

Class : Class 9

Ans 31:

Class : Class 9
NA meant no answer is correct and we had to leave this one empty

Ans 32:

Class : Class 8
NA? what is the explanation of the answer

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Time taken to utter single syllable=1/5th of a sSpeed of sound in air=330m s^-1 or 330m/sso distance to reflecting surface=1/5 * 330 as that will give the distance=66.0mSo, distance to reflecting surface is 66.0m

Ans 2:

Class : Class 9
please explain this question

Ans 3:

Class : Class 9

Ans 4:

Class : Class 8
Can someone please explain this question?

Ans 5:

Class : Class 8
please explain this question.

Ans 6:

Class : Class 8
Is the question wrong...? the answer should be 33.0 m as speed=2d/t

Ans 7:

Class : Class 8
Yes I think it is 33 also because it says it is an echo

Ans 8:

Class : Class 7
answer??????????????????????????????????????????????????????

Ans 9:

Class : Class 8
Yes, it should be 33m as distance for an echo = s x t/2

Ans 10:

Class : Class 9

Ans 11:

Class : Class 8
please explain this question.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5

Ans 3:

Class : Class 4
It is option B

Ans 4:

Class : Class 8
The correct answer is C

Ans 5:

Class : Class 4

Ans 6:

Class : Class 5
the answer is d as the mosquito does not look like the parent , has 3 stages of life and lays eggs while frog does not look like the adult , has 4 stages of life and lays eggs .

Ans 7:

Class : Class 9
the answer is d

Ans 8:

Class : Class 9

Ans 9:

Class : Class 4
correct answer is D

Ans 10:

Class : Class 3
The answer which is given in the SOF application is wrong, because a frog has four life stages in his life stages, the correct answer must be moth because it has only three life stages in his life cycle and the parent and child do not look same,

Ans 11:

Class : Class 4
Frog has 4 stages any of the answers are not correct

Ans 12:

Class : Class 5
THE ANSWER IS D AS FROG HAS 4 STAGES IN IT'S LIFE CYCLE ,BUT DOES NOT LOOK LIKE IT'S PARENT.WHILE,MOSQUITO HAS THREE SYTAGES IN IT'S LIFE CYCLE AND DOES NOT LOOK LIKE IT'S PARENT.I MADE THE SAME MISTAKE IN THE PREVIOUS TEST

Ans 13:

Class : Class 5
but frog dosnt have just 3 life stages it has 4 so its not the answer

Ans 14:

Class : Class 9

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
ans is B

Ans 2:

Class : Class 5
Answer is C

Ans 3:

Class : Class 7
super easy answer. it is 'A'

Ans 4:

Class : Class 5
ANS A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
No question?????????????????????????????

Ans 2:

Class : Class 9
question is incomplete

Ans 3:

Class : Class 7
There is no question. What are we supposed to answer. It is incomplete

Ans 4:

Class : Class 9
The question is there in the solution please check

Ans 5:

Class : Class 6
there is no proper question?

Ans 6:

Class : Class 9
No relevant question

Ans 7:

Class : Class 5
where is the question ??????????????????

Ans 8:

Class : Class 2

Ans 9:

Class : Class 5
what.

Ans 10:

Class : Class 4
There is no question and when I reported that error, it just came as "invalid"

Ans 11:

Class : Class 5
There is no question!

Ans 12:

Class : Class 5

Ans 13:

Class : Class 6
this is not a question

Ans 14:

Class : Class 4

Ans 15:

Class : Class 6
If they don't give the complete question, we all will get it wrongSOF please look into this matter

Ans 16:

Class : Class 5
where is the question???????????????????????????

Ans 17:

Class : Class 5
report error

Ans 18:

Class : Class 7
question????????????????

Ans 19:

Class : Class 7

Ans 20:

Class : Class 5
The question is incomplete

Ans 21:

Class : Class 6
Where is the question? Isn't it very vague?

Ans 22:

Class : Class 6
see the solution the question is how many kharif crops are there. there are 6.

Ans 23:

Class : Class 5
wrong question, incompleted question!!!!!!!!!!!!!????

Ans 24:

Class : Class 7
they did not give the question .

Ans 25:

Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 26:

Class : Class 9
What is the question?????????????????????????????????

Ans 27:

Class : Class 3
no question!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 28:

Class : Class 6

Ans 29:

Class : Class 5
WHERE IS THE QUESTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!??????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!???????????????????????????

Ans 30:

Class : Class 6
Where is the question!?

Ans 31:

Class : Class 5

Ans 32:

Class : Class 5
where the h

Ans 33:

Class : Class 5
The question is in the solution please check

Ans 34:

Class : Class 6

Ans 35:

Class : Class 10
question is incomplete

Ans 36:

Class : Class 6

Ans 37:

Class : Class 6
no question.report error please

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
explain please....

Ans 2:

Class : Class 8
Please explain how the deviation has happened at 180 degrees

Ans 3:

Class : Class 6
Thank You Mr.Rahul

Ans 4:

Class : Class 9
but due to water refraction will also take place

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
Why does the deviation happen to be 180 degrees

Ans 7:

Class : Class 8
Key Idea: Phenomenon of reflection is independent of medium. The deviation produced by combination of two plane mirrors is δ=2π−2θ =2π−2×π2 (θ=90o) ⇒ δ=π=180o. Hence, total deviation in incident ray is180o

Ans 8:

Class : Class 10
But wont the refraction of light in water play a role?

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