Science - Sorting Materials into Groups
Exam Duration: 45 Mins Total Questions : 30
Which of the following materials is suitable to make raincoats?
- (a)
Cotton
- (b)
Plastic
- (c)
Silk
- (d)
Paper
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
What are opaque objects?
- (a)
Those that reflect most of the light falling on them.
- (b)
Those that transmit most of the light falling on them.
- (c)
Those that refract most of the light falling on them.
- (d)
Those that are strong and hard.
Why are paper bags preferred over plastic bags?
- (a)
Paper bags are lighter.
- (b)
Paper bags are stronger.
- (c)
Paper bags are cheap.
- (d)
Paper bags are biodegradable
A vendor sells white powdered salt mixed with white powdered stone. Which of these properties will help you detect this malpractice?
- (a)
Ductility
- (b)
Opacity
- (c)
Density
- (d)
Solubility
Which is the most essential property of a substance to be used as a cooking vessel?
- (a)
Good conductor of heat
- (b)
Ductility
- (c)
Malleability
- (d)
All of the above
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 instrument is used to measure the density of liquids?
- (a)
Hydrometer
- (b)
Hygrometer
- (c)
Density meter
- (d)
Ammeter
Which of the given objects is hard, strong and unbreakable?
- (a)
Aluminium foil
- (b)
Paper bag
- (c)
Plastic file
- (d)
Glass table top
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'
A student added blue ink to a beaker containing water. After a few minutes the colour of water changed to blue. Which of these properties led to this colour change?
- (a)
Miscibility
- (b)
Malleability
- (c)
Ductility
- (d)
Compressibility
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
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
Which of these substances shows solubility in water?
- (a)
Sand
- (b)
Salt
- (c)
Chalk
- (d)
Iron pieces
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).
Which of these states of matter cannot be compressed?
- (a)
Liquids
- (b)
Gases
- (c)
Solids
- (d)
Semi-solids
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.
In the above table we can replace Rand T by
- (a)
paper and pens respectively.
- (b)
paper and cartons respectively.
- (c)
leather and magazine respectively.
- (d)
paper and cotton respectively.
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',
It is said that metals have lustre. An old wok of iron does not show any lustre or shine because
- (a)
iron is not a metal.
- (b)
of action of air and moisture on the iron.
- (c)
it is not cleaned properly.
- (d)
the old wok is totally b
Which one of the following is soluble in water?
- (a)
shampoo
- (b)
saw dust
- (c)
chalk powder
- (d)
melted wax
Which of these will not sink if we put it in water?
- (a)
sugar cube
- (b)
powdered salt
- (c)
rice husk
- (d)
honey
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'.