National Science Olympiad Forum By SOF Olympiad Trainer - Page 289

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Subject :NSO    Class : Class 10

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Subject :NSO    Class : Class 8

Ans 1:

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

Ans 2:

Class : Class 8

Ans 3:

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.

Ans 4:

Class : Class 9

Ans 5:

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.

Ans 6:

Class : Class 8

Ans 7:

Class : Class 8

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Subject :NSO    Class : Class 10

Ans 1:

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

Ans 2:

Class : Class 10
It is wrong. Answer is D

Ans 3:

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.

Ans 4:

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

Ans 5:

Class : Class 10

Ans 6:

Class : Class 10
what

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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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
why not b??

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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 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 3

Ans 3:

Class : Class 7

Ans 4:

Class : Class 4

Ans 5:

Class : Class 6
is all of these.

Ans 6:

Class : Class 3
all of these

Ans 7:

Class : Class 3
Speed post

Ans 8:

Class : Class 3
the answer seems incorrect. One can send an invitation through all of the available resources. However, if one wants to send invitation speedily, then the option of Speed Post would be more correct.

Ans 9:

Class : Class 4
the question framed incorrectly. It should have been sending wedding card at the earliest

Ans 10:

Class : Class 2
option a speed post

Ans 11:

Class : Class 3

Ans 12:

Class : Class 4
speed post

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