National Science Olympiad Forum By SOF Olympiad Trainer - Page 697

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
No iron fillings and sand are heavy

Ans 2:

Class : Class 5
Because iron fillings and sand can be separated as iron is heavier than sand.

Ans 3:

Class : Class 7
pl answer i think the answer will be(i),(iii) and (iv).please check and tel me if im correct

Ans 4:

Class : Class 7
The answer is (i) and (iii) because iron filling can be separated by using magnetic separation

Ans 5:

Class : Class 7
iron filings and sand can also be separated from winnowing

Ans 6:

Class : Class 5
Even I feel answer should be option 'B'

Ans 7:

Class : Class 6
B

Ans 8:

Class : Class 9

Ans 9:

Class : Class 7
checked in google sof gave right answer

Ans 10:

Class : Class 6
B

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
I think it is the option D because when an object is very close to a concave mirror that is its focal length, the image formed is magnified , laterally inverted and virtual .

Ans 4:

Class : Class 10
correct ans is option D because when an object is very close to a concave mirror that is on its focal length, the image formed is magnified , virtual, and laterally inverted.

Ans 5:

Class : Class 8
Why the answer cannot be A and B both i.e. Option D

Ans 6:

Class : Class 9
I think it should be all of the above, even concave mirror shows lateral inversion.

Ans 7: (Master Answer)

Class : Class 1
The correct answer is A.

Ans 8:

Class : Class 8

Ans 9:

Class : Class 5

Ans 10:

Class : Class 9
sorry convex mirror

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 10

Ans 1:

Class : Class 10
It is because diamonds contain no free electron and hence do not conduct electricity.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
Explanation - Combinations with B1 - B1G1G2, B1G1G3, B1G1G4, B1G2G3, B1G2G4, B1G3G4 Combinations with B2 - B2G1G2, B2G1G3, B2G1G4, B2G2G3, B2G2G4, B2G3G4 Hence total of 12 combinations. Answer is B (B stands for Boy and G stands for Girl)

Ans 2:

Class : Class 9
what type o

Ans 3:

Class : Class 4

Ans 4:

Class : Class 3
6

Ans 5:

Class : Class 5

Ans 6:

Class : Class 9
C

Ans 7:

Class : Class 5
Stupid question 😡😡😡

Ans 8:

Class : Class 7
stupid questionwhat logic 🤬🤬👿👿😡😡.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
A-P

Ans 3:

Class : Class 5

Ans 4:

Class : Class 8
please explain ow is the answer given is correct

Ans 5:

Class : Class 8
A]P only

Ans 6:

Class : Class 5
 A-P

Ans 7:

Class : Class 9
How the options are wrong

Ans 8:

Class : Class 8
pls give the explaination

Ans 9:

Class : Class 6
please explain P diagram

Ans 10:

Class : Class 4

Ans 11:

Class : Class 9
please give explanation

Ans 12:

Class : Class 5

Ans 13:

Class : Class 8

Ans 14:

Class : Class 6

Ans 15:

Class : Class 7

Ans 16:

Class : Class 5

Ans 17:

Class : Class 7

Ans 18:

Class : Class 6
Sof fools have not even given the solution. LOL!

Ans 19:

Class : Class 1
Explanation please.

Ans 20:

Class : Class 6
the answer's Q an R.

Ans 21:

Class : Class 9
My answer is correct but I need explanation. Can SOF and Admin explain the answer.Thank You

Ans 22:

Class : Class 5
Omg why didn’t they give the freaking explanation?!

Ans 23:

Class : Class 7

Ans 24:

Class : Class 5
I mean like seriously it is so hard....

Ans 25:

Class : Class 8
Please we need an explanation this q is hard.

Ans 26:

Class : Class 5
Class :Please give explanation....its really hard....I didn't get how is D the answer

Ans 27:

Class : Class 9

Ans 28:

Class : Class 7

Ans 29:

Class : Class 5
Actually r only has the property given

Ans 30:

Class : Class 8
plese exlination

Ans 31:

Class : Class 8
This question is very complicated please do help us understand by giving the explanation 😊

Ans 32:

Class : Class 7

Ans 33:

Class : Class 6
Sof kindly explain us how is the answer D it should be A

Ans 34:

Class : Class 7

Ans 35:

Class : Class 7
D is the answer because fig. p and fig. q pulley systems contain only one pulley wheres fig. r pulley system as two pulleys which makes the work easier

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