What is smallest identifiable unit of a substance ?
Atom
Molecule
Kilograms
Milligram
Among the following, which one has the highest rate of diffusion?
Solids
Liquids
Gases
Both a and b
Choose the most appropriate statement about classification .
Things are grouped together on the basis of colour.
Things are grouped together on the basis of smell.
Things are grouped on the basis of certain similar properties.
Things are grouped together on the basis of shapes .
Liquids which do not dissolve in one another ,when mixed are called:
Soluble liquid
Non soluble liquids
Miscible liquid
Non -miscible liquid
Who discovered Principle of Floating ?
Issac Newton
Archimedes
Albert Einstein
C.V.Raman
Liquids which dissolve in one another when mixed are called:
Soluble liquids
Non-soluble liquids
Non miscible liquid
The material through which no light can pass through are:
Opaque materials
Transparent materials
Translucent materials
Hard materials
Choose the correct statement.
Our universe is 99 percent gas.
Our universe is 99 percent solid.
Our universe is 99 percent Plasma.
Our universe is 99 percent liquid.
Which is the correct statement about solids ?
In solids, molecules are scattered.
In solids, molecules are loosely packed.
In solids, intermolecular space is very large.
In solids , the molecules are closely packed .
What is density of a substamnce ?
Mass per unit volume
Volume per unit mass
Mass per unit area
Weight per unit volume
