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Atoms and Molecules MCQ with Answers

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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 Answer

1) 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 Answer

1) 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

2) Molecular 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

We covered all the atoms and molecules MCQ with answers above in this post for free so that you can practice well for the exam.

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