Ionic & Covalent Compounds — Homi Bhabha Exam Chemistry MCQs with Solutions
Free Homi Bhabha Exam Chemistry Ionic & Covalent Compounds MCQs with step-by-step solutions (8 questions). Part of Periodic Classification & Chemical Bonding. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Ionic & Covalent Compounds · medium · theory
An ionic (electrovalent) bond is formed by the:
A. transfer of neutrons
B. transfer of electrons from one atom to another ✓ Correct
C. sharing of electrons
D. sharing of protons
Solution: In ionic bonding one atom donates electrons to another, forming oppositely charged ions that attract.
Q2 — Ionic & Covalent Compounds · medium · theory
A covalent bond is formed by the:
A. gain of neutrons
B. sharing of electrons between atoms ✓ Correct
C. loss of protons
D. complete transfer of electrons
Solution: Covalent bonds involve atoms sharing pairs of electrons.
Q3 — Ionic & Covalent Compounds · medium · theory
Sodium chloride (common salt) is an example of a(n):
A. noble gas
B. ionic compound ✓ Correct
C. metallic element
D. covalent compound
Solution: NaCl is formed by transfer of an electron from Na to Cl — an ionic compound.
Q4 — Ionic & Covalent Compounds · medium · theory
Which of the following is a covalent compound?
A. Sodium chloride (NaCl)
B. Calcium chloride (CaCl₂)
C. Magnesium oxide (MgO)
D. Water (H₂O) ✓ Correct
Solution: Water is formed by sharing electrons (covalent); the others are ionic.
Q5 — Ionic & Covalent Compounds · hard · theory
Ionic compounds conduct electricity when:
A. they are dry crystals
B. in the solid state
C. molten or dissolved in water ✓ Correct
D. they are gases
Solution: In molten or aqueous form the ions become free to move and carry current; solid ionic compounds do not conduct.
Q6 — Ionic & Covalent Compounds · hard · theory
Compared with covalent compounds, ionic compounds generally have:
A. the same melting points
B. lower melting points
C. higher melting and boiling points ✓ Correct
D. no melting point
Solution: Strong electrostatic forces between ions give ionic compounds high melting and boiling points.
Q7 — Ionic & Covalent Compounds · medium · theory
A positively charged ion formed when an atom loses electrons is called a:
A. anion
B. molecule
C. isotope
D. cation ✓ Correct
Solution: Loss of electrons leaves an excess positive charge, forming a cation (e.g. Na⁺).
Q8 — Ionic & Covalent Compounds · hard · theory
When sodium reacts with chlorine, sodium becomes ______ and chlorine becomes ______:
A. Na⁺; Cl⁺
B. Na⁻; Cl⁻
C. Na⁺ (loses 1 electron); Cl⁻ (gains 1 electron) ✓ Correct
D. Na⁻; Cl⁺
Solution: Sodium loses one electron to form Na⁺ and chlorine gains it to form Cl⁻, giving NaCl.