Arrange the following substances according to the increasing order of the interparticle force of attraction. Air; Kerosene; Pebble A. Kerosene < Pebble < Air B. Pebble < Kerosene < Air C. Air < Kerosene < Pebble
Which of the following is not a mixture ?
(a) Kerosene (b) air (c) alcohol (d) petrol
Why does a goldsmith blow air into the kerosene lamp flame with a blow-pipe ?
What are the three states of matter around us? Which of the following represents the substances in the increasing order of the force of attraction between their particles?
(a) Kerosene<Air<Salt (b) Air<Sugar<Oil
(c) Hydrogen gas<Juice<Chair (d) Salt<Water<Air
Classify the following changes as physical or chemical changes
Evaporation of alcohol
Expansion of air
Chewing food
Dissolving salt in water
Cooling a mixture of air and kerosene vapour
Burning a mixture of air and kerosene vapour
Pulling copper into thin wire
Tarnishing of jewellery