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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#41 Considering canal rays, which one has maximum e/m?
A) Hydrogen
B) Nitrogen
C) Oxygen
D) Helium
#42 The number of mole of oxygen in 6.02 x 1024 CO molecules is
A) 1
B) 0.5
C) 5
D) 10
#43 Which particle has the least mass?
A) Electron
B) Proton
C) Neutron
D) Alpha particle
#44 Which of the following molecules has a bent shape?
A) CO2
B) H2O
C) NH3
D) CH4
#45 Considering e/m of canal rays the correct order is:
A) Hydrogen > Helium > Nitrogen
B) Nitrogen > Helium > Hydrogen
C) Nitrogen = Helium = Hydrogen
D) All are correct
#46 How many mole of Oxygen are there in 0.5 mole of K2CrO7 ?
A) 7 mole
B) 6 mole
C) 4 mole
D) 3.5 mole
#47 Charge on an electron is:
A) Negative
B) Positive
C) Neutral
D) Double positive
#48 What type of bonding is present in a molecule of chlorine (Cl2)?
A) Ionic bonding
B) Covalent bonding
C) Metallic bonding
D) Coordinate bonding
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