Mashaal Masha
Mashaal Masha
 Oct 16, 2022
1

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Choose the correct options for the following questions.
The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as:
Difficulty: Easy
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A:
Chemistry
B:
Geology
C:
Physics
D:
Mechanics
Smallest particle of an element which may or may not have independent existence is known as:
Difficulty: Easy
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A:
A molecule
B:
An ion
C:
An atom
D:
An electron

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Matter is defined as anything which occupies space and:
Difficulty: Easy
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A:
Molecules
B:
Mass
C:
Compounds
D:
Chemicals
The number of atoms present in a molecule determines its :
Difficulty: Easy
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A:
Molecularity
B:
Atomicity
C:
Basicity
D:
Acidity
When an electron is added to a unipositive ion we get:
Difficulty: Easy
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A:
Cation
B:
Molecule
C:
Neutral atom
D:
Anion

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$CO^{+}$ is an example of
Difficulty: Easy
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A:
Stable molecule
B:
Anionic
C:
Cationic molecular ion
D:
Free radical
The diameter of atoms is of the order
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A:
$2\times10^{-5}$
B:
$2\times10^{-10}$
C:
$2\times10^{-2}$
D:
$2\times10^{-3}$
Swedish chemist J.Berzelius determined:
Difficulty: Easy
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A:
Atomic destiny
B:
Atomic number
C:
Atomic mass
D:
Atomic volume

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Covalent compounds mostly exist in the form of :
Difficulty: Easy
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A:
Protons
B:
Atoms
C:
Neutrons
D:
Molecules
Atoms and molecules can either gain or lose electrons, forming charged particles called:
Difficulty: Easy
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A:
Positrons
B:
Photons
C:
Ions
D:
Electrons

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