Olympiad Science - Sorting Materials into Groups
Exam Duration: 45 Mins Total Questions : 30
Which of the following materials is hard, opaque and shines?
- (a)
Rubber
- (b)
Wood
- (c)
Tin
- (d)
Plastic
Why are most of the balloons, tyres and footballs made of rubber?
- (a)
It is naturally available.
- (b)
It is cheap
- (c)
It is an electrical insulator.
- (d)
It is soft and flexible.
If opacity is the distinct feature of wood, then what is glass known for in the same way?
- (a)
Its transparency
- (b)
Its magnetic nature
- (c)
Its conductivity to heat
- (d)
Its lustrous nature
When Amrita was asked to pick up a few articles from a collection, she picked up the following:
1.Wooden scale
2. Glass test tube
3. Paper basket
Which of the following articles is she most likely to pick up the next?
- (a)
Steel cup
- (b)
Iron chain
- (c)
Rubber gloves
- (d)
Copper wire
Clinical thermometers are made of glass. Identify the characteristic(s) considered for the selection.
(i) It is a bad conductor of heat
(ii) It is transparent
(iii) It is strong
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(i), (ii) and (iii)
Door locks are made of metals. Which property of metals is made use of?
- (a)
They have lustre.
- (b)
They are opaque.
- (c)
They are good conductors of heat.
- (d)
They are hard and strong.
1 kg of iron occupies less space compared to 1 kg of sponge. Why?
- (a)
Iron has less density than sponge.
- (b)
Iron and sponge have equal densities.
- (c)
Iron has more density than sponge.
- (d)
Weight of iron per unit volume is less than that of sponge.
Which state of matter is easy to be compressed?
- (a)
Liquid
- (b)
Gaseous
- (c)
Solid
- (d)
Both (A) and (C)
Upon heating, solids usually turn into
- (a)
liquids.
- (b)
gases.
- (c)
(mixtures.
- (d)
either (A) or (C).
Salt dissolves in water to form salt water. Identify the solvent.
- (a)
Salt
- (b)
Water
- (c)
Salt-water
- (d)
Salt and water
Which of the following is true of pure water?
- (a)
A good conductor of electricity
- (b)
A bad conductor of electricity
- (c)
A semiconductor
- (d)
A superconductor
Which of the following type of bodies form sharp shadows when placed in the path of light?
- (a)
Transparent
- (b)
Translucent
- (c)
Transparent and translucent
- (d)
Opaque
Nishant put an object in front of a beam of light and noticed that a dark sharp shadow was immediately formed. What type of object did he place in front of light?
- (a)
A transparent object
- (b)
A translucent object
- (c)
An opaque object
- (d)
A flexible object
Suresh put the same things in two different bags X and Y. However, bag 'Y' could not hold all the items and got torn.
What did Suresh conclude?
- (a)
Bag 'X' is more flexible than bag 'Y'
- (b)
Bag 'Y' is lighter than bag 'X'
- (c)
Bag 'Y' is softer than bag 'X'
- (d)
Bag 'X is stronger than bag 'Y'
Which of the following statements is correct?
- (a)
Only some hard substances sink.
- (b)
All soft objects can be torn easily.
- (c)
All soft objects float in water.
- (d)
Some soft substances sink.
Which of the following is made of only one material?
- (a)
- (b)
- (c)
- (d)
The table given below shows some objects that have been grouped based on a certain property.
P | Q |
---|---|
Wooden ruler Copper wire Plastic cup | Iron rod Steel spoon |
What is the property on which the objects have been grouped?
- (a)
The ability to conduct electricity.
- (b)
The ability to conduct heat.
- (c)
The property of being attracted by a magnet.
- (d)
The ability to reflect light.
How are the items given in the box grouped as?
1. Ruler
2. Sharpener
3. Eraser
4. Pencil
5. Water colours
- (a)
Stationary
- (b)
Wooden
- (c)
Plastic
- (d)
Cutlery
Equal volumes of oil and water are taken in two glasses and weighed.
What is the likely outcome?
- (a)
Oil weighs more.
- (b)
Water weighs more.
- (c)
Both oil and water weigh the same.
- (d)
Water weighs less when heated.
Which of the following properties cannot be used for distinguishing a solid from a liquid?
- (a)
Solubility
- (b)
Compressibility
- (c)
Change of state
- (d)
Conductivity
Why are overhead cables not insulated?
- (a)
Because air is a bad conductor of electricity.
- (b)
Because air is a good conductor of electricity.
- (c)
Bare wires conduct electricity better.
- (d)
Both (B) and (C).
P | Q | R | S |
Pen | T-shirt | Notebooks | Fruits |
Mug | Vest | Magazines | Vegetables |
Television | Saree | Books | Rubber |
Study the table and answer the questions 1 to 5.
In the above table we can replace P by
- (a)
wood.
- (b)
plastic.
- (c)
paper.
- (d)
glass.
P | Q | R | S |
Pen | T-shirt | Notebooks | Fruits |
Mug | Vest | Magazines | Vegetables |
Television | Saree | Books | Rubber |
Study the table and answer the questions 1 to 5.
In the above table we can replace Q by
- (a)
cotton.
- (b)
fabric
- (c)
clothes.
- (d)
all of these
P | Q | R | S |
Pen | T-shirt | Notebooks | Fruits |
Mug | Vest | Magazines | Vegetables |
Television | Saree | Books | Rubber |
Study the table and answer the questions 1 to 5.
The things listed in column 5 tell us that
- (a)
these are obtained from plants.
- (b)
plants are important for us
- (c)
plants have a root and shoot system.
- (d)
both 'a' and 'b'.
The thing that we keep in mind before we choose a material to make an object is
- (a)
its looks.
- (b)
purpose for which the object will be used.
- (c)
its properties.
- (d)
both 'b' and 'c',
Which one of the following is soluble in water?
- (a)
shampoo
- (b)
saw dust
- (c)
chalk powder
- (d)
melted wax
Which one of these is not a transparent substance?
- (a)
water
- (b)
air
- (c)
window glass
- (d)
aluminium
Which one of the following is not translucent?
- (a)
leather
- (b)
plastic buckets
- (c)
Tinted glass windows of a card.
- (d)
butter paper
Sorting and grouping of things is done to
- (a)
make handling things convenient.
- (b)
study their similarities and dissimilarities easily.
- (c)
study their properties.
- (d)
all of these.
The kitchen utensils used for cooking are made up of metals like iron, aluminium, etc. This is because
- (a)
they allow the heat to pass through them.
- (b)
they are good conductors of heat.
- (c)
they have handles made up of plastic.
- (d)
both 'a' and 'b'.