National Science Olympiad Forum By SOF Olympiad Trainer - Page 553

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 8

Ans 1:

Class :
please explain this question.

Ans 2:

Class : Class 9
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 :
Can someone please explain this question?

Ans 5:

Class : Class 8
please explain this question.

Ans 6:

Class : Class 9

Ans 7:

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

Ans 8:

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 9:

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

Ans 10:

Class : Class 9

Ans 11:

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

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 9

Ans 2:

Class : Class 5

Ans 3:

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 4:

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

Ans 5:

Class : Class 8
The correct answer is C

Ans 6:

Class : Class 4
correct answer is D

Ans 7:

Class : Class 4

Ans 8:

Class : Class 9
the answer is d

Ans 9:

Class : Class 9

Ans 10:

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 11:

Class : Class 5

Ans 12:

Class : Class 4
It is option B

Ans 13:

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

Ans 14:

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 :
ANS A

Ans 2:

Class :
Answer is C

Ans 3:

Class : Class 5
ans is B

Ans 4:

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

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
they did not give the question .

Ans 2:

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

Ans 3:

Class : Class 4

Ans 4:

Class : Class 5

Ans 5:

Class : Class 6
there is no proper question?

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

Class : Class 2

Ans 10:

Class : Class 10
question is incomplete

Ans 11:

Class : Class 5
The question is incomplete

Ans 12:

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

Ans 13:

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

Ans 14:

Class : Class 5
There is no question!

Ans 15:

Class : Class 9
No relevant question

Ans 16:

Class : Class 7

Ans 17:

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

Ans 18:

Class : Class 6
no question.report error please

Ans 19:

Class : Class 6
Where is the question!?

Ans 20:

Class : Class 5

Ans 21:

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

Ans 22:

Class : Class 5
what.

Ans 23:

Class : Class 5
report error

Ans 24:

Class : Class 4
where is the questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 25:

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

Ans 26:

Class : Class 9
question is incomplete

Ans 27:

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

Ans 28:

Class : Class 6
this is not a question

Ans 29:

Class : Class 6

Ans 30:

Class : Class 6

Ans 31:

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

Ans 32:

Class : Class 6

Ans 33:

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

Ans 34:

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

Ans 35:

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

Ans 36:

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

Ans 37:

Class : Class 5
where the h

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8

Ans 2:

Class :
explain please....

Ans 3:

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 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

Class :
Why does the deviation happen to be 180 degrees

Ans 8:

Class : Class 6
Thank You Mr.Rahul

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Subject :NSO    Class : Class 6

Ans 1:

Class :
Answer can be A

Ans 2:

Class : Class 7

Ans 3:

Class :
D

Ans 4:

Class : Class 4
D

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

Ans 2:

Class :
pls explain how the answer is B

Ans 3:

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

Ans 4:

Class : Class 10
D is the correct answer.

Ans 5:

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 6:

Class : Class 8
pls explain how the answer is B

Ans 7:

Class : Class 6
the answer is D

Ans 8:

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

Ans 9:

Class : Class 9

Ans 10:

Class : Class 7
according to me D is correct

Ans 11:

Class : Class 6

Ans 12:

Class : Class 6

Ans 13:

Class : Class 5

Ans 14:

Class : Class 10

Ans 15:

Class :
D

Ans 16:

Class : Class 9
Answer is B

Ans 17:

Class : Class 7

Ans 18:

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

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)

Ans 20:

Class : Class 9
D is definitely the correct answer

Ans 21:

Class : Class 7

Ans 22:

Class : Class 7

Ans 23:

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 24:

Class : Class 3
D is the correct answer

Ans 25:

Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 3
It is C only!!!

Ans 2:

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 3:

Class : Class 8
The answer is B

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 7

Ans 7:

Class : Class 8

Ans 8:

Class : Class 7
Ans = C

Ans 9:

Class :
answer is B

Ans 10:

Class : Class 6
it is C, 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 4
It is C!!!!! Be careful!!!!!!!!!

Ans 13:

Class : Class 10

Ans 14:

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

Ans 15:

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

Ans 16:

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

Ans 17:

Class : Class 8

Ans 18:

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

Ans 19:

Class : Class 6
Very good and tricky question

Ans 20:

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

Ans 21:

Class : Class 7
thanks for the answer

Ans 22:

Class : Class 8
I think the is option B

Ans 23:

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

Ans 24:

Class :
The answer is B

Ans 25:

Class : Class 8

Ans 26:

Class :
Both statements are true

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Subject :NSO    Class : Class 3

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