National Science Olympiad Forum By SOF Olympiad Trainer - Page 233

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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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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 7

Ans 3:

Class : Class 3
Speed post

Ans 4:

Class : Class 4

Ans 5:

Class : Class 3
the question framed incorrectly. It should have been sending wedding card at the earliest

Ans 6:

Class : Class 5
is all of these.

Ans 7:

Class : Class 4
speed post

Ans 8:

Class : Class 2
option a speed post

Ans 9:

Class : Class 3

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

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Subject :NSO    Class : Class 6

Subhi, a class 6 student grouped together a few changes occurring around us as:
Group 1 : Blooming of flowers, breaking of glass, vaporisation of water, sawing of wood
Group 2 : Tides in the ocean, motion of a swing, landslides, occurrence of day and night
Group 3 : Rusting, germination of seeds, burning of fire crackers, growth of a child
Group 4 : Making a paper boat, blowing air into balloon, baking a roti, heating an iron rod
Select the odd one in each group and mention the property which makes it odd.

  Group 1 Group 2 Group 3 Group 4
A Blooming
of flowers
(Physical
change)
Tides in
the ocean
(Periodic
change)
Rusting
(Chemical
change)
Making a
paper boat
(Physical
change)
B Breaking
of glass
(Irreversible
change)
Occurrence
of day
and night
(Natural
change)
Germination
of seeds
(Irreversible
change)
Blowing
air into
balloon
(Reversible
change)
C Sawing
of wood
(Physical
change)
Motion of
a swing
(Periodic
change)
Growth
of a child
(Irreversible
change)
Heating an
iron rod
(Chemical
change)
D Vaporisation
of water
(Reversible
change)
Landslides
(Nonperiodic
change)
Burning of
fire crackers
(Fast
change)
Baking
a roti
(Chemical
change)


Ans 1:

Class : Class 6
Question is not properly framed

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 5
None of these

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Subject :NSO    Class : Class 8

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