National Science Olympiad Forum By SOF Olympiad Trainer - Page 285

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
How ?

Ans 2:

Class : Class 5

Ans 3:

Class : Class 4
Who knows? only heaven knows.

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Also, B and D can be more musical than A because they change frequently, constituting a pleasant sound, whereas A is a single monotone.

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Class : Class 8

Ans 3:

Class : Class 9

Ans 4:

Class : Class 8

Ans 5:

Class : Class 8

Ans 6:

Class : Class 8
B and D can also constitute a pleasant sound as they are also similar to A.

Ans 7:

Class : Class 8
This question isn't related to any pleasant or unpleasant sound. Also, if the distance travelled by the sonic vibrations is 2x, time is 2 seconds and speed is 1.5 km/s, the distance= speed*time=1.5*2=3 km. The answer should be 3 km, not 1.5 km. SOF is requested to kindly rectify this error.

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Subject :NSO    Class : Class 10

Ans 1:

Class : Class 9
The givern answer is wrong!!!!!!!!!

Ans 2:

Class : Class 6
Q is a metal and S is a non metal, and therefore Q has a greater chance at losing electrons. The correct option is D.

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Class : Class 10

Ans 4:

Class : Class 10
what

Ans 5:

Class : Class 10
YEAH What is this! Answer should be D!!!!!!! What is this!

Ans 6:

Class : Class 10
It is wrong. Answer is D

Ans 7:

Class : Class 10
the answer for this question is option D,since Q is more electropositive than s and thus will lose electrons easily .But in the answer key it is given as optionB.

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