National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 5

Ans 3:

Class : Class 7

Ans 4:

Class : Class 7

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 8

Refer to the given flow chart. Identify hormones X and Y and select the correct option regarding them.


A Glands secreting hormone Y are located on the posterior surface of glands secreting hormone X.
B Myxoedema is caused by hyposecretion of a hormone secreted by gland that also secretes hormone Y.
C Both hormones X and Y are secreted by same endocrine gland but are antagonistic to each other in functioning.
D Hyposecretion of hormone Y leads to osteoporosis as more calcium is drawn from bones to raise blood calcium level.


Ans 1:

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

Ans 2:

Class : Class 9
Please explain the answer

Ans 3:

Class : Class 8
NA means no answer but what we had to do with it

Ans 4:

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

Ans 5:

Class : Class 8

Ans 6:

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

Ans 7:

Class : Class 8
if there is no answer,then why was it considered wrong?it is not fair.

Ans 8:

Class : Class 8
PLEASE GIVE THE ANSWER ALONG WITH EXPLANTION

Ans 9:

Class : Class 8
what does NA mean?

Ans 10:

Class : Class 8
NA means 'No Answer'.But the guidelines clearly state 'Mark all questions.'How is this fair?

Ans 11:

Class : Class 10

Ans 12:

Class : Class 9
why no reply...

Ans 13:

Class : Class 4

Ans 14:

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

Ans 15:

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

Ans 16:

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

Ans 17:

Class : Class 10

Ans 18:

Class : Class 9

Ans 19:

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

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
"NA"?.please explain the answer

Ans 22:

Class : Class 8

Ans 23:

Class : Class 9

Ans 24:

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

Ans 25:

Class : Class 8

Ans 26:

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

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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 8
please explain this question.

Ans 4:

Class : Class 9

Ans 5:

Class : Class 8
Can someone please explain this question?

Ans 6:

Class : Class 8
answer??????????????????????????????????????????????????????

Ans 7:

Class : Class 8
please explain this question.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
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 2:

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 3:

Class : Class 5

Ans 4:

Class : Class 6
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 6
the answer is d

Ans 8:

Class : Class 5

Ans 9:

Class : Class 6

Ans 10:

Class : Class 4
correct answer is D

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
super easy answer. it is 'A'

Ans 2:

Class : Class 5
Answer is C

Ans 3:

Class : Class 5
ANS A

Ans 4:

Class : Class 5
ans is B

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
The question is incomplete

Ans 2:

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

Ans 3:

Class : Class 5
No relevant question

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6
there is no proper question?

Ans 6:

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

Ans 7:

Class : Class 5
report error

Ans 8:

Class : Class 8

Ans 9:

Class : Class 6

Ans 10:

Class : Class 6
The question is there in the solution please check

Ans 11:

Class : Class 6
no question.report error please

Ans 12:

Class : Class 8
What is the question?????????????????????????????????

Ans 13:

Class : Class 6

Ans 14:

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

Ans 15:

Class : Class 7
question is incomplete

Ans 16:

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

Ans 17:

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

Ans 18:

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

Ans 19:

Class : Class 6
question is incomplete

Ans 20:

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

Ans 21:

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

Ans 22:

Class : Class 5
There is no question!

Ans 23:

Class : Class 7
they did not give the question .

Ans 24:

Class : Class 6
No question?????????????????????????????

Ans 25:

Class : Class 5

Ans 26:

Class : Class 4
no question!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Subject :NSO    Class : Class 8

Ans 1:

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

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
Why does the deviation happen to be 180 degrees

Ans 4:

Class : Class 6
Thank You Mr.Rahul

Ans 5:

Class : Class 8
explain please....

Ans 6:

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

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