Kerala SCERT Class 8 Science Chapter 5 Basic Constituents of Matter Question Answer Solution Here. Kerala Board Class 8 Students can find Here 5th Chapter Basic Constituents of Matter Notes provide by our Teacher. Important Question Answer from Chapter 5 Basic Constituents of Matter.
- Board- Kerala Board.
- Class – 8.
- Subject – Science Part 1
- Chapter – 5.
- Chapter Name – Basic Constituents of Matter.
- Topic – Question Answer Solution.
Question: (1) the pure substance which cannot be further decomposed through chemical process are called_________?
(a) Elements
(b) Compounds
Ans: – Elements.
Question: (2) ________ are pure substance formed from two or more elements through chemical combination?
(a) Compounds
(b) Components
Ans: – Compounds.
Question: (3) ___________ is smallest particle which show all characteristic properties of an element?
(a) Atom
(b) Molecule
Ans: – Atom.
Question: (4) the smallest particle which can exist independently are called __________?
(a) Molecule
(b) Atom
Ans: – Molecule.
Question: (5) ___________ formulated the modern theory of atom?
(a) John Dalton
(b) Berzelius
(c) Sir Humphrey Davy
(d) Henry Cavendish
Ans: – John Dalton.
Question: (6) molecule with only one atom are called _______ molecules.
(a) Monatomic
(b) Diatomic
(c) Polyatomic
Ans: – Monatomic.
Question: (7) molecule with two atoms are called__________?
(a) Diatomic molecule
(b) Monatomic molecule
(c) Polyatomic molecule
Ans: – Diatomic molecule.
Question: (8) molecule with more than two atoms are called _______ molecule?
(a) Diatomic molecule
(b) Monatomic molecule
(c) Polyatomic molecule
Ans: – Polyatomic molecule.
Question: (9) the carbon dioxide molecule reprented as CO2 this representation is known as _________ of the compound?
Ans: – Chemical formula.
Question: (10) the substance taking parts in chemical reaction are called_________?
(a) Reactants
(b) Products
Ans: – Reactants
Question: (11) substance formed as a result of the reaction are called _________?
(a) Product
(b) Reactants
Ans: – Product.
Question: (12) the number of atoms of the some kind of reactants product should be equal these equations are called_________?
(a)Balanced chemical equation
(b) Unbalanced chemical equation.
Ans: – Balanced chemical equation.
SHORT QUESTION:
Question: (1) define element?
Ans: – The pure substances which cannot be further decomposing through chemical process are called elements.
Question: (2) define compounds?
Ans: – Compounds are pure substance formed two or more elements through chemical combination.
Question: (3) what is meant by atom?
Ans: – Atom is smallest particle which show all characteristic properties of an element.
Question: (4) how to balance chemical equation?
Ans: – When a chemical equation is written, the number of atoms of some kind, on the side of reactant and that of products should be equal.
SHORT NOTE:
Question: (1) what is chemical formula?
Ans: – A fixed ratio is maintained between the atoms of different element present in it in carbon dioxide molecule the ratio of carbon atom to oxygen atom is always 1:2 thus carbon dioxide molecule as CO2. This type representation is known as chemical formula.