Common science questions and answers

Common science questions for basic knowledge –


1 • what is the name of reaction between an Acid and a base is  .

Answer. Neutralisation or Neutralization .

2 • What is Oxidation .

Answerthe loss of electrons know as a oxidation and Reduction is the gain of electrons 

3 • Which is The most conductive metal .


Answer. Silver

4 • What is Hydropower  .

Answer. In this process Hydropower create energy From the action of falling water , as water falls from a height the energy is used to turn turbines which create a electricity .

5 • What is Solar energy –

Answer. Energy produced by sun is called solar energy . the sun radiation trapped in solar panels then is turn into electricity .

6 • The First Three Alkanes are –


AnswerMethane  (  Ch4 )
                  Ethane  ( Ch3Ch3 )
                   Propane ( Ch3Ch2Ch3 ) 

7 • What is chemical bond –

Answer. the physical process where atoms and molecules to be attracted together then bound in new  compounds is called chemical bond

8 • When acid rain occurs – 

Answer. Acid rain occurs When Sulphur dioxide and nitrogen dioxide are emitted in to air . 

9 • what is Atomic mass number –

Answer. Symbol of atomic mass number is ( A )  , it is the total number of protons and neutrons in the nucleus of an atom .

10 •  what is atomic number – 

Answer. Symbol of atomic number is ( Z )  , it is the number of protons in atom .

11 •  Molar mass –

Answer. Molar mass ( M ) is the mass of one mole a chemical substance . unit of molar mass is gm/mole 

12 •  Fundamental units are there in SI System –

Answer. 7 ( seven ) ,  fundamental units in SI system .

13 • Fundamental particles of atom – 

Answer. Electron , proton and neutron .

14 • Formula of neutrons –

Number of neutrons = mass number – atomic number present in elements .

15 • Formula of atomic weight –

Atomic weight = no . of protons + no . of neutrons .














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