National Science Olympiad Forum By SOF Olympiad Trainer - Page 494

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

Class : Class 8
Can someone 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
please explain this question.

Ans 6:

Class : Class 8
please explain this question.

Ans 7:

Class : Class 9

Ans 8:

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 9:

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

Ans 10:

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

Ans 11:

Class : Class 9

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 9
the answer is d

Ans 2:

Class : Class 9

Ans 3:

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 4:

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 5:

Class : Class 5

Ans 6:

Class : Class 4
correct answer is D

Ans 7:

Class : Class 4

Ans 8:

Class : Class 4
It is option B

Ans 9:

Class : Class 9

Ans 10:

Class : Class 5

Ans 11:

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 12:

Class : Class 8
The correct answer is C

Ans 13:

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

Ans 14:

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

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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
Answer is C

Ans 3:

Class : Class 5
ans is B

Ans 4:

Class : Class 5
ANS A

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Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

Class : Class 4

Ans 5:

Class : Class 5
There is no question!

Ans 6:

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

Ans 7:

Class : Class 5
where the h

Ans 8:

Class : Class 5
report error

Ans 9:

Class : Class 7

Ans 10:

Class : Class 5

Ans 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

Class : Class 9
No relevant question

Ans 15:

Class : Class 9
question is incomplete

Ans 16:

Class : Class 2

Ans 17:

Class : Class 6
no question.report error please

Ans 18:

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

Ans 19:

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

Ans 20:

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

Ans 21:

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

Ans 22:

Class : Class 6
Where is the question!?

Ans 23:

Class : Class 5

Ans 24:

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

Ans 25:

Class : Class 6

Ans 26:

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

Ans 27:

Class : Class 5
what.

Ans 28:

Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 29:

Class : Class 10
question is incomplete

Ans 30:

Class : Class 7
they did not give the question .

Ans 31:

Class : Class 6

Ans 32:

Class : Class 6
this is not a question

Ans 33:

Class : Class 5
The question is incomplete

Ans 34:

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

Ans 35:

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

Ans 36:

Class : Class 6
there is no proper question?

Ans 37:

Class : Class 6

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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 9
but due to water refraction will also take place

Ans 3:

Class : Class 8

Ans 4:

Class : Class 6
Thank You Mr.Rahul

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

Ans 7:

Class : Class 8
explain please....

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 4
D

Ans 3:

Class : Class 6
D

Ans 4:

Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

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

Ans 3:

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

Ans 4:

Class : Class 10

Ans 5:

Class : Class 3
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 8
pls explain how the answer is B

Ans 8:

Class : Class 6
pls explain how the answer is B

Ans 9:

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 10:

Class : Class 9
D is definitely the correct answer

Ans 11:

Class : Class 6

Ans 12:

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

Ans 13:

Class : Class 6

Ans 14:

Class : Class 6

Ans 15:

Class : Class 9

Ans 16:

Class : Class 7

Ans 17:

Class : Class 6
D

Ans 18:

Class : Class 9
Answer is B

Ans 19:

Class : Class 10
D is the correct answer.

Ans 20:

Class : Class 8

Ans 21:

Class : Class 7
according to me D is correct

Ans 22:

Class : Class 7

Ans 23:

Class : Class 6
the answer is D

Ans 24:

Class : Class 7

Ans 25:

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.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
Very good and tricky question

Ans 2:

Class : Class 7
I agree with A Ramakrishna's point

Ans 3:

Class : Class 8
I think the is option B

Ans 4:

Class : Class 7

Ans 5:

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

Ans 6:

Class : Class 7
Ans = C

Ans 7:

Class : Class 6
Both statements are true

Ans 8:

Class : Class 8
The answer is B

Ans 9:

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

Ans 10:

Class : Class 8

Ans 11:

Class : Class 4
It is C!!!!! Be careful!!!!!!!!!

Ans 12:

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

Ans 13:

Class : Class 10

Ans 14:

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

Ans 15:

Class : Class 5
its an error as weaving is done as sam eas decribed in statement 2 i think answer should be ...............BBBBB......................

Ans 16:

Class : Class 7
thanks for the answer

Ans 17:

Class : Class 7
answer is B

Ans 18:

Class : Class 8

Ans 19:

Class : Class 8
it is cccccccccccccccccccccc!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 20:

Class : Class 7
the answer is C because YARNS are woven not FIBRES

Ans 21:

Class : Class 3
It is C only!!!

Ans 22:

Class : Class 4
The answer is B

Ans 23:

Class : Class 7
The answer would be C. If you read the question carefully, it says, "Weaving is done by interlacing two sets of FIBRES at right angles." There are two things wrong with this: 1) They need not be interlaced at right angles. 2) The question clearly says 'fibres', not 'yarns' as it should be. Therefore, the answer is C.

Ans 24:

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

Ans 25:

Class : Class 8

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Subject :NSO    Class : Class 3

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