Which one of the following is NOT correct?
HeatSolid → Liquid
Cool Solid → Gas
CoolLiquid → Solid
heatLiquid → gas
Asma lit a perfume stick in the corner of a room. When she stood at the other corner, she smelled the perfume after sometime. What can we conclude from this?
Rooms produce perfume when a perfume stick is lit in a corner
All the air present in room gives perfume
Perfumes do not spread from one place to another.
All gases, including perfumes, have the property of spreading from one place to another.
Which one of the following processes involves a decrease in the intermolecular forces between the molecules?
Condensation
Crystallisation
Evaporation
All of the above
Which one of the following conversations is correct?
Heat HeatWater → Steam → Ice
Cool CoolSteam → Water → Ice
Cool Cool Water → Ice → Steam
Heat CoolSteam → Ice → Water
We can separate sand from the water by
filtration
evaporation
boiling
A student took 20 millilitres of water in a beaker and dissolved two teaspoonful of sugar in it. When he checked the volume, to his surprise, the volume remained same at 20 millilitres. Can you tell the reason?
Sugar did not actually dissolve in the water
Sugar evaporated
Sugar occupied the empty spaces in between the molecules of water.
Sugar has zero volume
A student took water and dissolved some salt in it. Later she placed the salty water under sunlight for three days. she found only the crystals of salt but not water. The process demonstrated in the above experiment is
condensation
Which one of the following transformations is occurring in the given figure?
Melting
Boiling
Which one of the following can vary in volume?
Book
Spinning top
Balloon
Kettle
The intermolecular space is more in
mercury
water
hydrogen
iron
