National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

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

Ans 1:

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

Ans 2:

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

Ans 3:

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.

Ans 4:

Class : Class 10
what

Post Your Answer

Subject :NSO    Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 8

Post Your Answer

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.


Post Your Answer

Subject :NSO    Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 5

Post Your Answer

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 .

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4

Ans 2:

Class : Class 3
Speed post

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Post Your Answer

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)


Post Your Answer