National Science Olympiad Forum By SOF Olympiad Trainer - Page 449

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
b

Ans 2:

Class : Class 7
Answer is B . If we imagine that the planet X is mercuryAnd planet Y is Mars who will take more time it will be Mercury because it is near to the sun and will revoluteFaster than Mars

Ans 3:

Class : Class 8
Biju Pappachan ... Whom do you address as Snow White ?

Ans 4:

Class : Class 1
Hello Snow White!haha

Ans 5:

Class : Class 8

Ans 6:

Class : Class 4

Ans 7:

Class : Class 7
B is the answer to this question

Ans 8:

Class : Class 1
Any ways,can anyone explain??

Ans 9:

Class : Class 7
Sorry sorry the Mars will take more time who ever isReading my post

Ans 10:

Class : Class 10

Ans 11:

Class : Class 8
answer is B

Ans 12:

Class : Class 1
Take no offence,Snow White.

Ans 13:

Class : Class 9
B because it means ( here ) that orbit will be bigger as a planet is away from sun and, longer distance means long revolution

Ans 14:

Class : Class 9
Who is this Snow White, man!

Ans 15:

Class : Class 6
Answer is B.

Ans 16:

Class : Class 6
B

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Subject :NSO    Class : Class 4

Avinash grouped plants on the basis of their habitats. By mistake, he placed one wrong plant in each group. Identify the odd member of each group and select the correct option.
Group I : Duckweed, Hydrilla, Opuntia
Group II : Banyan, Mango, Acacia
Group III : Barrel cactus, Joshua tree, Vallisneria

A Duckweed in group I is incorrectly placed and should be replaced with arrowhead plant.
B Mango in group II should be interchanged with Joshua tree in group III.
C Opuntia in group I should be interchanged with Vallisneria in group III.
D Banyan in group II is incorrectly placed and should be replaced with gulmohar.


Ans 1:

Class : Class 8
😓how.????

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4

Ans 4:

Class : Class 8
NA

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Subject :NSO    Class : Class 3

Ans 1:

Class :
D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
You have to specify if waxing or waning crescent

Ans 3:

Class : Class 8

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7
I too am confused as current will also flow through both the bulbs when circuit is closed. It will pass through the switch first and hence lighting up bulb Y.

Ans 2:

Class : Class 8
The answer key says that X will not light up,but why?

Ans 3:

Class : Class 9

Ans 4:

Class : Class 6
The answer should be B as it will be closed circuit

Ans 5:

Class : Class 9
yes i too did B

Ans 6:

Class : Class 8
answer should be B

Ans 7:

Class : Class 6
answer should be b because X will also lit up

Ans 8:

Class : Class 10
b

Ans 9:

Class : Class 6
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb is correct as current will flow though X but I do feel that current will prefer less resistant path so D can also be correct

Ans 10:

Class : Class 8
X will light up... I think it's incorrect....

Ans 11:

Class : Class 3
Option D is correct because current prefers the path that offers less resistance. The bulb provides resistance whereas the switch when closed does not. Hence correct answer is D

Ans 12:

Class : Class 8
logically it should be B but sof says otherwise. why ????

Ans 13:

Class : Class 8

Ans 14:

Class : Class 8
The answer is B

Ans 15:

Class : Class 8
Please explain it. I am also confused about the answer. I myself did B.

Ans 16:

Class : Class 8
It must be B.The current finds a more direct path to Y, Making it brighter.But the current still reaches X because there is still a path. SOF Says otherwise.

Ans 17:

Class : Class 9
Yess,my answer was B also

Ans 18:

Class : Class 8

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Sorry , my brother changed the C into D . It should be C only !

Ans 2:

Class : Class 3
D

Ans 3:

Class : Class 6
The answer is d

Ans 4:

Class : Class 9

Ans 5:

Class : Class 7

Ans 6:

Class : Class 8
I was a bit confused between C and D

Ans 7:

Class : Class 7

Ans 8:

Class : Class 4
Low High Many Many

Ans 9:

Class : Class 5
no chart no answer

Ans 10:

Class : Class 9
The answer is c

Ans 11:

Class : Class 7

Ans 12:

Class : Class 4
d

Ans 13:

Class : Class 6
Veer Sehrawat, how c, the question says which town is located near an unpolluted river not a polluted river.

Ans 14:

Class : Class 9
Sorry all, I had not read the question well.😞😞

Ans 15:

Class : Class 7
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 16:

Class : Class 9

Ans 17:

Class : Class 4
ans is D so easy

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7

Ans 2:

Class : Class 9

Ans 3:

Class : Class 8
NA

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Subject :NSO    Class : Class 4

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