National Science Olympiad Forum By SOF Olympiad Trainer - Page 487

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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 7:

Class : Class 9

Ans 8:

Class : Class 10

Ans 9:

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

Ans 10:

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

Ans 11:

Class : Class 8

Ans 12:

Class : Class 9

Ans 13:

Class : Class 8
PLEASE GIVE THE ANSWER ALONG WITH EXPLANTION

Ans 14:

Class : Class 9
What the heck is going on.

Ans 15:

Class : Class 4
NA means no answer but what we had to do with it

Ans 16:

Class : Class 9
Please explain the answer

Ans 17:

Class : Class 9
why no reply...

Ans 18:

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

Ans 19:

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

Ans 20:

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

Ans 21:

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

Ans 22:

Class : Class 6

Ans 23:

Class : Class 8

Ans 24:

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

Ans 25:

Class : Class 7

Ans 26:

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

Ans 27:

Class : Class 7
what does NA mean?

Ans 28:

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 29:

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

Ans 30:

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

Ans 31:

Class : Class 4

Ans 32:

Class : Class 10

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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 7
answer??????????????????????????????????????????????????????

Ans 3:

Class : Class 8
please explain this question.

Ans 4:

Class : Class 9

Ans 5:

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

Ans 6:

Class : Class 8
Can someone please explain this question?

Ans 7:

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

Ans 8:

Class : Class 9
please explain this question

Ans 9:

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

Ans 10:

Class : Class 8
please explain this question.

Ans 11:

Class : Class 9

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

Ans 2:

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 3:

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 4:

Class : Class 4
correct answer is D

Ans 5:

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 6:

Class : Class 9
the answer is d

Ans 7:

Class : Class 8

Ans 8:

Class : Class 5

Ans 9:

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

Ans 10:

Class : Class 4
It is option B

Ans 11:

Class : Class 9

Ans 12:

Class : Class 8
The correct answer is C

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 4

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 5
ANS A

Ans 3:

Class : Class 5
Answer is C

Ans 4:

Class : Class 5
ans is B

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Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

Class : Class 5
where the h

Ans 3:

Class : Class 10
question is incomplete

Ans 4:

Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 5:

Class : Class 6
Where is the question!?

Ans 6:

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

Ans 7:

Class : Class 6

Ans 8:

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

Ans 9:

Class : Class 5

Ans 10:

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

Ans 11:

Class : Class 4

Ans 12:

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

Ans 13:

Class : Class 5
this is not a question

Ans 14:

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

Ans 15:

Class : Class 6

Ans 16:

Class : Class 5
The question is incomplete

Ans 17:

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

Ans 18:

Class : Class 5
what.

Ans 19:

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

Ans 20:

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

Ans 21:

Class : Class 6
there is no proper question?

Ans 22:

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

Ans 23:

Class : Class 5
There is no question!

Ans 24:

Class : Class 6
no question.report error please

Ans 25:

Class : Class 6

Ans 26:

Class : Class 5
report error

Ans 27:

Class : Class 5

Ans 28:

Class : Class 9
question is incomplete

Ans 29:

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

Ans 30:

Class : Class 2

Ans 31:

Class : Class 6

Ans 32:

Class : Class 7
they did not give the question .

Ans 33:

Class : Class 9
No relevant question

Ans 34:

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

Ans 35:

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

Ans 36:

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

Ans 37:

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

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
explain please....

Ans 2:

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 3:

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

Ans 4:

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

Ans 5:

Class : Class 6
Thank You Mr.Rahul

Ans 6:

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

Ans 7:

Class : Class 8

Ans 8:

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

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 4
D

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6
Answer can be A

Ans 4:

Class : Class 6
D

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6
D

Ans 4:

Class : Class 9
When a battery is constructed such that all the positive terminal of the cells are connected to a same point and all the negative terminals of the cells are connected to another point then the grouping of cells in this manner is called the Parallel Grouping of cells. The two end terminals of the construct where all the positive and negative terminals of the cells are connected act as the corresponding terminal of the battery.

Ans 5:

Class : Class 10
D is the correct answer.

Ans 6:

Class : Class 6
Answer B is the correct answer as the question specified for the arrangement which will allow the bulb to stay lighted for the longest possible time. Option B is connected as One cell as per the circuit (all connections are in parallel), While Option D is in Series (in case of failure of one cell, the circuit will not work as the current will not pass through the cell)

Ans 7:

Class : Class 9
D is definitely the correct answer

Ans 8:

Class : Class 7
How many times will olympiad confuse us its D

Ans 9:

Class : Class 7
according to me D is correct

Ans 10:

Class : Class 7

Ans 11:

Class : Class 6
the answer is D

Ans 12:

Class : Class 3
D is the correct answer

Ans 13:

Class : Class 10

Ans 14:

Class : Class 6
pls explain how the answer is bBTW: your answer is correct

Ans 15:

Class : Class 9
Answer is B

Ans 16:

Class : Class 6

Ans 17:

Class : Class 6
According to me D is the correct answer

Ans 18:

Class : Class 7

Ans 19:

Class : Class 9

Ans 20:

Class : Class 6
pls explain how the answer is B

Ans 21:

Class : Class 6
According to me D is the correct answer as a wire should be connected from a terminal of a battery to the - terminal of the battery for longer stay of electric circuit, and this rule is satisfied by the circuit shown in option D.

Ans 22:

Class : Class 8

Ans 23:

Class : Class 6

Ans 24:

Class : Class 8
pls explain how the answer is B

Ans 25:

Class : Class 6

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