Atoms and Molecules MCQ with Answers

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

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

Mass of one mole of a substance is called 1) Atomic mass 2) Molecular mass 3) Molar mass 4) Unit mass

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

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

" 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

Law of conservation of mass was experimentally verified by 1) Lavoisier 2) Landolt 3) Proust 4) Berzelius

Law of conservation of mass was proposed by 1) Landolt 2) Lavoisier 3) Dalton 4) 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

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Atoms and Molecules MCQ with Answers

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

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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

Answers in Last Page >>>

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

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Mass of one mole of a substance is called 1) Atomic mass 2) Molecular mass 3) Molar mass 4) Unit mass

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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

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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

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" 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

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Law of conservation of mass was experimentally verified by 1) Lavoisier 2) Landolt 3) Proust 4) Berzelius

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Law of conservation of mass was proposed by 1) Landolt 2) Lavoisier 3) Dalton 4) Proust

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Among the following the elements that are discovered and named after scientist 1) Einsteinium 2) Fermium 3) Rutherfordium and Mendelevium 4) all the above

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