Grouping and classification of objects - class-VI
grouping and classification of objects
Questions
The density of alcohol is 800 $ \displaystyle Kg/m^{3} $. Its relative density is:
- 8
- 0.8
- 0.08
- 800
Solubility is the amount of the .................... present in the saturated solution at a particular temperature.
- solute
- solvent
- dispersed phase
- dispersed medium
The amount of the solute present in the saturated solution at a particular temperature is called its :
- solubility
- saturation
- solvent concentration
- none of the above
A block of iron (density 9.8 $ \displaystyle g/cm^{3}) $ if added in mercury (density 13.6 $ \displaystyle g/cm^{3} $ ) will:
- sink
- float
- neither float nor sink i.e. remain suspended in mercury
- none of these
A block of aluminium of density 2.75 $ \displaystyle g/cm^{3} $ has a volume of 30$ \displaystyle cm^{3} $. The mass of the block is:
- $27$ gm
- $18 $ gm
- $82.5$ gm
- $810$ gm
A block of wood has mass 200 kg. If the density of wood is 800 $ \displaystyle kg/m^{3} $, its volume will be:
- 0.25 $ \displaystyle m^{3} $
- 25 $ \displaystyle m^{3} $
- 250$ \displaystyle cm^{3} $
- none of these
Identify the materials from the following which float in water:
- wax, iron nails, sponge
- plastic, wood, oil
- ice, oil, sand
- honey, thermocol, keys
Opaque objects:
- does not transmit most of the light falling on them
- transmit most of the light falling on them
- absorb most of the light falling on them
- are strong and hard
Transparent substances:
- absorb all the light incident on them.
- allow light to pass through them.
- do not allow light to pass through them.
- allow light to pass through them only partially.
Which of the following is translucent?
- Copper
- Wood
- Butter paper
- Glass
Find the odd man out in terms of material it is made of:
- Rubber
- Gold
- Coal
- Chalk
Which of the following has dull appearance?
- Gold foil
- Aluminium foil
- Steel rod
- Bricks
Select the metal which is hardest among the following:
- silver
- gold
- platinum
- aluminium
Which among the following is the softest metal?
- Platinum
- Silver
- Iron
- Aluminium
Most balloons, tires, and footballs are made of rubber. This is because rubber is:
- naturally available
- cheap
- an electrical insulator
- soft and flexible
Which of the following is lustrous?
- Steel furniture
- Wooden furniture
- Plastic chair
- Football
You are provided with the following four materials as wood, plastic, wool and steel. Which of the given material will you identify as hardest and softest respectively?
- Wood and wool
- Plastic and steel
- Wool and steel
- Steel and wool
Find the odd one out on the basis of the appearance of an object.
- Paper
- Cardboard
- Iron
- Playing cards