Chemistry Top 100 Repeated MCQs
MDCAT · NUMS · FSc · Entry Test — most asked Chemistry questions with answers
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These Chemistry MCQs are picked from high-yield FSc chapters and mix sets — the kind of questions that appear again and again in MDCAT, NUMS, and board exams. Use page navigation below to practice all 100 MCQs, then try the Chemistry mock test.
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#17 VSEPR theory is used to predict:
A) Molecular mass
B) Molecular shape
C) Reaction rate
D) Ionization energy
#18 How many grams are there in 48 amu of carbon?
A) 7.8 x 10-23
B) 8.7 x 10-25
C) 9.11 x 10-28
D) 1.6 x 10-23
#19 Isobars have the same:
A) Atomic number
B) Number of neutrons
C) Mass number
D) Electronic configuration
#20 What type of bonding is responsible for the formation of a hydrogen molecule (H2)?
A) Ionic bonding
B) Covalent bonding
C) Metallic bonding
D) Coordinate bonding
#21 In VSEPR theory, lone pairs cause:
A) Increase in bond length
B) Decrease in bond angle
C) No change in geometry
D) Ionic bonding
#22 A mole of any substance is related to
A) Number of particles
B) Volume of gaseous substance
C) Mass of a substance
D) all of the above
#23 Isotones have the same:
A) Number of neutrons
B) Atomic number
C) Mass number
D) Number of protons
#24 The shape of the ammonia (NH3) molecule is?
A) Tetrahedral
B) Trigonal planar
C) Trigonal pyramidal
D) Linear
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