National Science Olympiad Forum By SOF Olympiad Trainer - Page 485

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 6

Ans 4:

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 5:

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 6:

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

Ans 7:

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

Ans 8:

Class : Class 10

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

Class : Class 4

Ans 14:

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

Ans 15:

Class : Class 9
why no reply...

Ans 16:

Class : Class 7

Ans 17:

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

Ans 18:

Class : Class 8

Ans 19:

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

Ans 20:

Class : Class 8

Ans 21:

Class : Class 9
Please explain the answer

Ans 22:

Class : Class 9

Ans 23:

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

Ans 24:

Class : Class 9

Ans 25:

Class : Class 7
what does NA mean?

Ans 26:

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

Ans 27:

Class : Class 8
PLEASE GIVE THE ANSWER ALONG WITH EXPLANTION

Ans 28:

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

Ans 29:

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

Ans 30:

Class : Class 10

Ans 31:

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

Ans 32:

Class : Class 9
What the heck is going on.

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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 8
please explain this question.

Ans 3:

Class : Class 9
please explain this question

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 8
please explain this question.

Ans 7:

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

Ans 8:

Class : Class 9

Ans 9:

Class : Class 8
Can someone please explain this question?

Ans 10:

Class : Class 9

Ans 11:

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

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Subject :NSO    Class : Class 4

Ans 1:

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 2:

Class : Class 4

Ans 3:

Class : Class 5

Ans 4:

Class : Class 5

Ans 5:

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

Ans 6:

Class : Class 4
It is option B

Ans 7:

Class : Class 9

Ans 8:

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 9:

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 10:

Class : Class 8

Ans 11:

Class : Class 4
correct answer is D

Ans 12:

Class : Class 8
The correct answer is C

Ans 13:

Class : Class 9
the answer is d

Ans 14:

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

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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
ans is B

Ans 4:

Class : Class 5
Answer is C

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

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

Ans 3:

Class : Class 2

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 7:

Class : Class 5

Ans 8:

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

Ans 9:

Class : Class 9
question is incomplete

Ans 10:

Class : Class 10
question is incomplete

Ans 11:

Class : Class 5
report error

Ans 12:

Class : Class 5
this is not a question

Ans 13:

Class : Class 5

Ans 14:

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

Ans 15:

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

Ans 16:

Class : Class 7
they did not give the question .

Ans 17:

Class : Class 6
Where is the question!?

Ans 18:

Class : Class 5
The question is incomplete

Ans 19:

Class : Class 5
what.

Ans 20:

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

Ans 21:

Class : Class 9
No relevant question

Ans 22:

Class : Class 6

Ans 23:

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

Ans 24:

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

Ans 25:

Class : Class 5
where the h

Ans 26:

Class : Class 6

Ans 27:

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

Ans 28:

Class : Class 6
there is no proper question?

Ans 29:

Class : Class 6

Ans 30:

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

Ans 31:

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

Ans 32:

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

Ans 33:

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

Ans 34:

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

Ans 35:

Class : Class 6
no question.report error please

Ans 36:

Class : Class 4

Ans 37:

Class : Class 5
There is no question!

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 6
Thank You Mr.Rahul

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
explain please....

Ans 4:

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

Ans 5:

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 6:

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

Ans 7:

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

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 6
Answer can be A

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6
D

Ans 4:

Class : Class 4
D

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
D is definitely the correct answer

Ans 2:

Class : Class 6
How many times will olympiad confuse us its D

Ans 3:

Class : Class 7

Ans 4:

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

Ans 5:

Class : Class 9

Ans 6:

Class : Class 6

Ans 7:

Class : Class 3
D is the correct answer

Ans 8:

Class : Class 6
pls explain how the answer is B

Ans 9:

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 10:

Class : Class 7

Ans 11:

Class : Class 9
Answer is B

Ans 12:

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 13:

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 14:

Class : Class 7

Ans 15:

Class : Class 8
pls explain how the answer is B

Ans 16:

Class : Class 8

Ans 17:

Class : Class 7

Ans 18:

Class : Class 6
D

Ans 19:

Class : Class 6

Ans 20:

Class : Class 6
the answer is D

Ans 21:

Class : Class 6

Ans 22:

Class : Class 10
D is the correct answer.

Ans 23:

Class : Class 10

Ans 24:

Class : Class 7
according to me D is correct

Ans 25:

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

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