National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Can someone please explain this question?

Ans 2:

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 3:

Class : Class 8
please explain this question.

Ans 4:

Class : Class 9

Ans 5:

Class : Class 9
please explain this question

Ans 6:

Class : Class 8
please explain this question.

Ans 7:

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

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
the answer is d

Ans 2:

Class : Class 5
The correct answer is C

Ans 3:

Class : Class 4

Ans 4:

Class : Class 5

Ans 5:

Class : Class 4
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 4
correct answer is D

Ans 7:

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 8:

Class : Class 5

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,

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
ans is B

Ans 2:

Class : Class 5
ANS A

Ans 3:

Class : Class 5
super easy answer. it is 'A'

Ans 4:

Class : Class 5
Answer is C

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
question is incomplete

Ans 2:

Class : Class 5

Ans 3:

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

Ans 4:

Class : Class 5
If they don't give the complete question, we all will get it wrongSOF please look into this matter

Ans 5:

Class : Class 5

Ans 6:

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

Ans 7:

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

Ans 8:

Class : Class 5
No relevant question

Ans 9:

Class : Class 5
see the solution the question is how many kharif crops are there. there are 6.

Ans 10:

Class : Class 5

Ans 11:

Class : Class 6

Ans 12:

Class : Class 5
There is no question!

Ans 13:

Class : Class 6
What is the question?????????????????????????????????

Ans 14:

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

Ans 15:

Class : Class 6

Ans 16:

Class : Class 6
question????????????????

Ans 17:

Class : Class 6
they did not give the question .

Ans 18:

Class : Class 5
no question.report error please

Ans 19:

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

Ans 20:

Class : Class 6
there is no proper 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
The question is incomplete

Ans 23:

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
but due to water refraction will also take place

Ans 3:

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 4:

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

Ans 5:

Class : Class 6
Thank You Mr.Rahul

Ans 6:

Class : Class 8
explain please....

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
D

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6
Answer can be A

Ans 4:

Class : Class 6
D

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6
D

Ans 3:

Class : Class 7
according to me D is correct

Ans 4:

Class : Class 7
Answer is B

Ans 5:

Class : Class 6

Ans 6:

Class : Class 6

Ans 7:

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

Ans 8:

Class : Class 7
pls explain how the answer is B

Ans 9:

Class : Class 7

Ans 10:

Class : Class 6
pls explain how the answer is B

Ans 11:

Class : Class 7
D is the correct answer.

Ans 12:

Class : Class 6

Ans 13:

Class : Class 6
D is definitely the correct answer

Ans 14:

Class : Class 6

Ans 15:

Class : Class 7
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 16:

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 17:

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

Ans 18:

Class : Class 7

Ans 19:

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)

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Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1 : Fibres are first spun into yarns, which are then woven or knit into fabrics.
Statement 2 : Weaving is done by interlacing two sets of fibres at right angles on a loom.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true and statement 2 is false.
DBoth statements 1 and 2 are false.


Ans 1:

Class : Class 7

Ans 2:

Class : Class 7
There seems to be an error in this. We feel that it is B

Ans 3:

Class : Class 6
the correct answer is c as it is given weaving fibres not weaving yarn.read the question carefully.

Ans 4:

Class : Class 6
I agree with A Ramakrishna's point

Ans 5:

Class : Class 7
It is C!!!!! Be careful!!!!!!!!!

Ans 6:

Class : Class 3
Answer is C. As you can't weave fibres.read the question properly!!!!!!!!!!!!!!!

Ans 7:

Class : Class 7

Ans 8:

Class : Class 1
there is an error. the answer is C

Ans 9:

Class : Class 4
The answer is B

Ans 10:

Class : Class 7

Ans 11:

Class : Class 6
Answer is C. ttraj's point is true.

Ans 12:

Class : Class 7
I think the is option B

Ans 13:

Class : Class 7
The answer is B

Ans 14:

Class : Class 6
Both statements are true

Ans 15:

Class : Class 7
answer is B

Ans 16:

Class : Class 6
its an error as weaving is done as sam eas decribed in statement 2 i think answer should be ...............BBBBB......................

Ans 17:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
C

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