• 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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