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20 questions
Which of the following materials is not lustrous?
Gold
Silver
Wood
Diamond
Which type of the following materials is used for making the front glass (wind screen) of a car?
Transparent
Translucent
Opaque
None of the above
Materials that cannot be compressed easily are called __________
Soft
Rough
Scaly
Hard
An oiled paper act as a _______ material.
Transparent
Translucent
Hard
Opaque
Take two samples, one is oil and other is water. Mix the two. You observe that
They are soluble.
Oil floats on water
Water floats on oil
None of the above
Which one of the following dissolve in water
Wood
Rock
Sugar
Plastic
Which of the following substance is opaque?
Wood
Glass container
Oily paper
Water
Which of the following does not float on water?
Feather
Paper
Coconut oil
Stone
Find the odd one?
Sugar
Salt
Glucose
Sand
Which of the following statements is not true?
Materials are grouped for convenience.
Materials are grouped to study their properties.
Materials are grouped for fun.
Materials are grouped according to their uses.
Which of the following materials is hard, opaque and shines?
Rubber
Plastic
Wood
Tin
Which of the following materials is suitable to make raincoats?
Cotton
Plastic
Silk
Paper
Why are most of the balloons, tyres and footballs made of rubber?
It is naturally available.
It is cheap.
It is an electrical insulator.
It is soft and flexible.
If opacity is the distinct feature of wood, then what is glass known for in the same way?
Its transparency
Its magnetic nature
Its conductivity to heat
Its lustrous nature
A mirror is
opaque.
transparent
translucent.
flexible
Which characteristics given below are of metals?
(i) They are hard.
(ii) They have lustre.
(iii) They are good conductors of electricity
Only (i) and (ii
Only (ii) and (iii)
Only (i) and (iii)
i), (ii) and (iii)
Why are paper bags preferred over plastic bags?
Paper bags are lighter.
Paper bags are stronger.
Paper bags are cheap
Paper bags are biodegradable.
Door locks are made of metals. Which property of metals is made use of?
They have lustre
They are opaque
They are good conductors of heat.
They are hard and strong
Kerosene does not dissolve in water. What are they called?
Immiscible liquids
Solute and solvent
Solvent and solution
Miscible liquids
Which is the most essential property of a substance to be used as a cooking vessel?
Good conductor of heat
Ductility
Malleability
All of the above
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