Atoms and Molecules MCQ with Answers. We covered all the Atoms and Molecules MCQ with Answers in this post for free so that you can practice well for the exam.
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MCQ on Atoms and Molecules for Students
………. represents the atoms and ………. represents molecular and compounds.
1) Names of formula
2) symbols & formula
3) formula & symbols
4) Names & valency
Option 2 – symbols & formula
What is the symbol of sodium
1) S
2) Na
3) K
4) Sd
Option 2 – Na
Latin word for water is
Which State of India experiences the maximum annual variation of rainfall?
(A) Meghalaya
(B) Kerala
(C) Rajasthan
(D) West Bengal
Show Answer1) Hydro
2) Helios
3) Hydrogen
4) Oxy
Option 1 – Hydro
The gas which was first discovered in the sun
1) Hydrogen
2) Oxygen
3) Helium
4) Nitrogen
Option 3 – Helium
Law of definite proportion was given by
Pakyong Airport is located in?
(A) Sikkim
(B) Jammu and Kashmir
(C) Arunachal Pradesh
(D) Mizoram
Show Answer1) John Dalton
2) Lavoisier
3) Joseph Proust
4) Ritcher
Option 3 – Joseph Proust
Among the following the elements that are discovered and named after scientist
1) Einsteinium
2) Fermium
3) Rutherfordium and Mendelevium
4) all the above
Option 3 – Rutherfordium and Mendelevium
Law of conservation of mass was proposed by
1) Landolt
2) Lavoisier
3) Dalton
4) Proust
Option 2 – Lavoisier
Law of conservation of mass was experimentally verified by
1) Lavoisier
2) Landolt
3) Proust
4) Berzelius
Option 2 – Landolt
” A given chemical substance always contains the same elements combined in a fixed proportions by weight ” is called
1) Law of conservation of mass
2) Law of constant proportions
3) Law of definite proportions
4) both b & c
Option 2 – Law of constant proportions
Which postulate of Dalton’s theory is the result of law conservation of mass
1) matter can be neither created nor destroyed
2) atoms of different elements or different in properties
3) atoms similar elements or similar in properties
4) atoms is a smallest particle take part in chemical reactions
Option 1 – matter can be neither created nor destroyed
An element X forms the oxides containing 57.7% and 42.3% of Oxygen respectively. This indicates the law of
1) Definite proportions
2) Multiple proportions
3) Reciprocal proportions
4) None of these
Option 2 – Multiple proportions
A …….. is the smallest particle of an element or a compound that is capable of independent existence and retain all the properties of that substance.
1) Molecule
2) Compound
3) Atom
4) Mixture
Option 1 – Molecule
Mass of one mole of a substance is called
1) Atomic mass
3) Molar mass
4) Unit mass
Option 3 – Molar mass
The total mass of the products formed in a chemical reaction is exactly equal to the mass of the reactants. This is known as
1) Law of conservation of mass
2) Law of multiple proportions
3) Law of definite proportions
4) None of these
Option 1 – Law of conservation of mass
In a chemical substance the elements are always present in fixed proportions by mass. This is known as the :
1) Law of conservation of mass.
2) Law of multiple proportions
3) Law of definite proportions
4) None of these
Option 3 – Law of definite proportions
An ………. is the smallest particle of an element that can participate in chemical reaction and retain all its properties.
1. Molecule
2) Compound
3) Atom
4) Mixture
Option 3 – Atom
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