National Science Olympiad Forum By SOF Olympiad Trainer - Page 485

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 6
Thank You Mr.Rahul

Ans 4:

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

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

Ans 8:

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 4
D

Ans 4:

Class : Class 6
Answer can be A

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Subject :NSO    Class : Class 6

Ans 1:

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 2:

Class : Class 7

Ans 3:

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

Ans 4:

Class : Class 9
Answer is B

Ans 5:

Class : Class 9

Ans 6:

Class : Class 7

Ans 7:

Class : Class 3
D is the correct answer

Ans 8:

Class : Class 6

Ans 9:

Class : Class 10

Ans 10:

Class : Class 7
according to me D is correct

Ans 11:

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 12:

Class : Class 10
D is the correct answer.

Ans 13:

Class : Class 9
D is definitely the correct answer

Ans 14:

Class : Class 7

Ans 15:

Class : Class 7

Ans 16:

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

Ans 17:

Class : Class 6

Ans 18:

Class : Class 6
How many times will olympiad confuse us its D

Ans 19:

Class : Class 6
the answer is D

Ans 20:

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 21:

Class : Class 7

Ans 22:

Class : Class 6
D

Ans 23:

Class : Class 6

Ans 24:

Class : Class 6
pls explain how the answer is B

Ans 25:

Class : Class 8
pls explain how the answer is B

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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 8

Ans 2:

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

Ans 3:

Class : Class 3
It is C only!!!

Ans 4:

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

Ans 5:

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

Ans 6:

Class : Class 8
The answer is B

Ans 7:

Class : Class 10

Ans 8:

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

Ans 9:

Class : Class 4
The answer is B

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

Class : Class 7
Ans = C

Ans 14:

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

Ans 15:

Class : Class 8

Ans 16:

Class : Class 7

Ans 17:

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

Ans 18:

Class : Class 8

Ans 19:

Class : Class 7
answer is B

Ans 20:

Class : Class 8
I think the is option B

Ans 21:

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 22:

Class : Class 6
Both statements are true

Ans 23:

Class : Class 7
thanks for the answer

Ans 24:

Class : Class 6
Very good and tricky question

Ans 25:

Class : Class 7
it is cccccccccccccccccccccc!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
p

Ans 2:

Class : Class 7
Bubble pack is a good insulator than a cotton wool.

Ans 3:

Class : Class 7

Ans 4:

Class : Class 8
ns is C

Ans 5:

Class : Class 8
ans is c

Ans 6:

Class : Class 8
q

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 9
Yes it is CQ is female gamete and it does transform into endosperm

Ans 2:

Class : Class 9

Ans 3:

Class : Class 8
c

Ans 4:

Class : Class 7
C is correct, the statement (i) is vague

Ans 5:

Class : Class 9

Ans 6:

Class : Class 7

Ans 7:

Class : Class 10
why not statement V is correct ?SOF pls explain

Ans 8:

Class : Class 7

Ans 9:

Class : Class 8
it should be C ,since C is the ovule

Ans 10:

Class : Class 9
b is the answer

Ans 11:

Class : Class 9

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
D

Ans 2:

Class : Class 4
option D

Ans 3:

Class : Class 9
HOW🌗🌔🌏🌺🌏🐎🐚🦃🎃🐓🌍🌸🌍🐓🌼🍄🐁🌼🐐😳😳😳😳😳😳😳😳😳😳😳😳😳😳

Ans 4:

Class : Class 4
C is not correct

Ans 5:

Class : Class 6
D

Ans 6:

Class : Class 10
correct ans in option D

Ans 7:

Class : Class 4
answer is D

Ans 8:

Class : Class 4
D

Ans 9:

Class : Class 5
Option C is also correct. So students selecting Option C should be awarded 2 marks.

Ans 10:

Class : Class 4
cxvcv3cvtvhFVChcwlejn ljenlf wfh bh b huebvfhdocjcjnnnncncfhvb bhcbhbdhcvdgb hdbf hfjn nj n jncnnhfohvhbvobuwr3hqaswedrfthnjmk,ljnbvcxxcfvbsdcfvgbxdcFVGBDCVBNMxcvbnmdfghjasdfgjkzawsxedcrvftghnjqzawsxdfvtghunzasxdcrfvgswderftgyhazwsdfg dfgsdfghjkljghgfbjcxnjxnjnnccjjcjdccujcdjfhnvfcduhcccccccfffffffffffffffffrrrrrrrrrrrffffffffffffffffwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwevvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv jfknwjf ejjjjjjjjncvfjnb fjnvfjvmifmccccccccccccccccccccccccccccccccccccccccffvweevwevwrtvtrwh fccccczsxxxxxxxxxxxxxhhhhhhhhdsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss z cf ffffffffffffffffffffffffffffffffffffffffffffffffffffffff nmmmmmmmnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Ans 11:

Class : Class 4
D

Ans 12:

Class : Class 4

Ans 13:

Class : Class 5
D

Ans 14:

Class : Class 4
c ant be correct cause Venus is not made up of frozen gases

Ans 15:

Class : Class 5
D