A small boy mischievously mixed small pebbles into a bag of pulses. What method will you employ to separate the mixture ?
Magnetic separation
Crystallisation
Handpicking
Filtration
Identify the compound from the following.
Carbon dioxide
Iron
Hydrogen
Air
Pick out the liquid-in-gas type of mixture from the following.
Dissolved carbon dioxide in water
Droplets of water in air
Oxygen dissolved in water
All of the above
Wheat flour is separated from wheat bran by the method of :
handpicking
sieving
winnowing
filtration
In a mixture , constituents exhibit :
similar properties
only those properties which are characteristic to the mixture
their own properties
no properties
Pure substances possess :
variable melting points and boiling points
nonuniform composition
variable properties
fixed melting points and boiling points
Identify the mixture from the following.
Oxygen
A pure substance is made up of :
only one kind of molecules
two or more kinds of molecules
different types of molecules
none of the above
Winnowing is useful only when :
two solids have different melting points
two solids have different boiling points
two solids have different magnetic properties
two solids have different weights
A few coloured glass pieces that are big in size are mixed with sugar . The easiest way to separate them is :
heat the mixture
add the mixture of water
handpick the glass pieces
handpick the sugar particles
