Education

9th Class Chemistry Important Questions Answers.
Industrial Chemistry.
The branch of chemistry which deal with the study of commercial composition of compounds methods.
Bio Chemistry
In which study of living bodies internal structure take place.
What is mixture.
Mixing of two or more compounds is called mixture.
Homo genesis mixture
Same composition of compound
Hetero genesis.
Different composition of compound
Types of Molecules.
Mono atomic molecules
Di atomic molecules
Tri atomic molecules
Poly atomic molecules
What is ion
In atom have positive charge is called ion
Na>Na*+e
Long form periodic table write 2 properties
The period consist of seven periods
Properties change in periods
Consist of 18 groups
Why ice float on water
The density of ice is less than water so they float on water
What is metalic coating
Covering of metals on other metals for their protection
Write two properties of metals
They are lustrous bright
good conductor of heat and electric city.
Write two properties of non metals
Bad conductor of heat and electric city
They are v.soft