National Science Olympiad Forum By SOF Olympiad Trainer

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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

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Class : Class 8

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

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Subject :NSO    Class : Class 10

Position of five elements P, Q, R, S and T is shown on the simplified form of the periodic table.
image
The element which has maximum tendency to lose electron, the element which has maximum tendency to gain electrons and the element which has no tendency to gain or lose electrons are respectively

A P, R and S
B S, R and T
C Q, S and P
D Q, R and T.


the correct answer for this question is option D.This is because Qhas more metallic property as compared to S,thus it more electropositive in nature .But the answer given for this question is B.I request you to revise the answer key

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Class : Class 10
what

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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

The given figure represents the pattern of blood circulation in human body.

Select the incorrect statement regarding this.

AQ and P carry oxygenated blood whereas R and S carry deoxygenated blood.
BY represents right side of the heart, i.e., right atrium and right ventricle.
CP and S carry oxygenated blood whereas Q and R carry deoxygenated blood.
DX represents left side of the heart, i.e., left atrium and left ventricle.


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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 8

A spoon is kept in contact with ice cubes for some time. Later, the same spoon was held over the flame of a small candle. The observation is shown in the figure.
What do you infer from the given figure?


A Spoon is an inflammable substance.
B Burning of candle is a spontaneous process.
C Carbon dioxide is a product of combustion.
D Water vapour is a product of combustion.


The correct answer is D . The combustion of Hydrocarbons produces water/water vapour .

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