M2 MCQs Questions
Question No. 1
An atom with three electrons in its outermost shell is described as:
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Option A: Pentavalent
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Option B: Covalent
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Option C: Trivalent
Question No. 2
The mass number of an element represents the total of:
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Option A: Electrons and protons
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Option B: Neutrons and protons
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Option C: Electrons and neutrons
Question No. 3
Combining 2H₂ with O₂ yields which compound?
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Option A: H₂O
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Option B: 2H₂O
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Option C: 2H₂O₂
Question No. 4
The process of breaking a chemical compound into simpler substances is called:
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Option A: Bombardment
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Option B: Synthesis
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Option C: Analysis
Question No. 5
The atomic number of an element indicates the total number of:
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Option A: Neutrons
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Option B: Electrons
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Option C: Protons
Question No. 6
An atom with five electrons in its outermost shell is described as:
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Option A: Pentavalent
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Option B: Covalent
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Option C: Trivalent
Question No. 7
Which of the following correctly describes the components contained in an atom:
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Option A: Protons, neutrons, and electrons
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Option B: Protons and electrons only
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Option C: Protons and neutrons only
Question No. 8
The maximum number of electrons that the first (inner) shell of an atom can hold is:
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Option A: 8
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Option B: 2
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Option C: 4
Question No. 9
The mass of a proton which is approximately equal to the mass of a:
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Option A: Neutron
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Option B: Beta particle
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Option C: Electron
Question No. 10
Which function of Catalysts is correct:
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Option A: Speed up chemical reactions
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Option B: Speed up or slow down reactions
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Option C: Slow down chemical reactions
Question No. 11
If an atom’s outer shell is completely filled, the element is generally:
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Option A: Unstable or highly reactive
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Option B: A good conductor
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Option C: Chemically inert
Question No. 12
Molecules of the same substance are held together primarily by:
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Option A: Cohesive forces
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Option B: Adhesive forces
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Option C: Gravitational forces
Question No. 13
Which of the following is Oxygen exhibiting a valency of:
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Option A: 2
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Option B: 6
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Option C: 8
Question No. 14
In an atom, the further a shell is from the nucleus:
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Option A: Shell spacing remains the same
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Option B: Shells get closer together
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Option C: Shells move further apart
Question No. 15
An element’s chemical identity is determined by the number of:
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Option A: Neutrons
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Option B: Electrons
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Option C: Protons
Question No. 16
An isotope of an element differs from the normal atom in its number of:
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Option A: Electrons
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Option B: Neutrons
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Option C: Protons
Question No. 17
The smallest unit of an element that retains its chemical properties is called a _______.
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Option A: A compound
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Option B: An atom
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Option C: A molecule
Question No. 18
Which of the following is correct about nucleus of an atom contains:
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Option A: Protons and electrons
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Option B: Protons and neutrons
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Option C: Electrons and neutrons
Question No. 19
Atomic mass is defined as the total number of:
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Option A: Neutrons
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Option B: Protons plus neutrons
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Option C: Protons
Question No. 20
When a solid melts into a liquid, it typically occupies:
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Option A: Less space
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Option B: The same amount of space
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Option C: More space