National Science Olympiad Forum By SOF Olympiad Trainer - Page 563

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

Class :
Can someone please explain this question?

Ans 3:

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

Ans 4:

Class : Class 9

Ans 5:

Class :
please explain this question.

Ans 6:

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

Ans 7:

Class :
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 8:

Class : Class 8
please explain this question.

Ans 9:

Class : Class 9

Ans 10:

Class : Class 9
Yes, it should be 33m as distance for an echo = s x t/2

Ans 11:

Class : Class 9
please explain this question

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Subject :NSO    Class : Class 4

Ans 1:

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 2:

Class : Class 9

Ans 3:

Class : Class 5

Ans 4:

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 5:

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 6:

Class : Class 8
The correct answer is C

Ans 7:

Class : Class 4

Ans 8:

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

Ans 9:

Class : Class 4
correct answer is D

Ans 10:

Class : Class 5

Ans 11:

Class : Class 9

Ans 12:

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

Ans 13:

Class : Class 4
It is option B

Ans 14:

Class : Class 9
the answer is d

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
ans is B

Ans 2:

Class :
ANS A

Ans 3:

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

Ans 4:

Class :
Answer is C

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
no question.report error please

Ans 2:

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

Ans 3:

Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 4:

Class : Class 5
There is no question!

Ans 5:

Class : Class 7

Ans 6:

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

Ans 7:

Class : Class 2

Ans 8:

Class : Class 4

Ans 9:

Class : Class 10
question is incomplete

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

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

Ans 15:

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

Ans 16:

Class : Class 5
what.

Ans 17:

Class : Class 9
No relevant question

Ans 18:

Class : Class 6
Where is the question!?

Ans 19:

Class : Class 5
where the h

Ans 20:

Class : Class 8
WHERE IS THE QUESTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!??????????????????????????????????????????????????????????????????????????????????!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!???????????????????????????

Ans 21:

Class : Class 8
There is no question. What are we supposed to answer. It is incomplete

Ans 22:

Class : Class 5

Ans 23:

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

Ans 24:

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

Ans 25:

Class : Class 6

Ans 26:

Class : Class 9
question is incomplete

Ans 27:

Class : Class 5
report error

Ans 28:

Class : Class 7
they did not give the question .

Ans 29:

Class : Class 5
The question is incomplete

Ans 30:

Class : Class 6
this is not a question

Ans 31:

Class : Class 6
there is no proper question?

Ans 32:

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

Ans 33:

Class : Class 6

Ans 34:

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

Ans 35:

Class : Class 6

Ans 36:

Class : Class 5

Ans 37:

Class : Class 9
What is the 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 :
Why does the deviation happen to be 180 degrees

Ans 3:

Class :
explain please....

Ans 4:

Class : Class 8

Ans 5:

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

Ans 6:

Class :
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 7:

Class : Class 6
Thank You Mr.Rahul

Ans 8:

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

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Subject :NSO    Class : Class 6

Ans 1:

Class :
Answer can be A

Ans 2:

Class : Class 4
D

Ans 3:

Class :
D

Ans 4:

Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class :
pls explain how the answer is B

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7

Ans 4:

Class : Class 5

Ans 5:

Class : Class 10

Ans 6:

Class : Class 7

Ans 7:

Class : Class 8
How many times will olympiad confuse us its D

Ans 8:

Class : Class 7
according to me D is correct

Ans 9:

Class :
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 6
According to me D is the correct answer

Ans 11:

Class : Class 7

Ans 12:

Class :
D

Ans 13:

Class : Class 10
D is the correct answer.

Ans 14:

Class : Class 9

Ans 15:

Class : Class 9
D is definitely the correct answer

Ans 16:

Class : Class 8
pls explain how the answer is B

Ans 17:

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 18:

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

Ans 19:

Class : Class 6
the answer is D

Ans 20:

Class : Class 3
D is the correct answer

Ans 21:

Class : Class 9
Answer is B

Ans 22:

Class : Class 6

Ans 23:

Class : Class 8

Ans 24:

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 25:

Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10

Ans 2:

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

Ans 3:

Class : Class 6
Very good and tricky question

Ans 4:

Class : Class 7
thanks for the answer

Ans 5:

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

Ans 6:

Class : Class 8
The answer is B

Ans 7:

Class : Class 8

Ans 8:

Class : Class 7
Ans = C

Ans 9:

Class :
answer is B

Ans 10:

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

Ans 11:

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

Ans 12:

Class : Class 8

Ans 13:

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

Ans 14:

Class :
Both statements are true

Ans 15:

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

Ans 16:

Class : Class 3
It is C only!!!

Ans 17:

Class : Class 7

Ans 18:

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

Ans 19:

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

Ans 20:

Class : Class 6
it is C, YARNS are woven not FIBRES.

Ans 21:

Class : Class 8
I think the is option B

Ans 22:

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

Ans 23:

Class :
The answer is B

Ans 24:

Class : Class 8

Ans 25:

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 26:

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

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Subject :NSO    Class : Class 3

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