The high boiling point of water compared to H₂S or HCl is due to:
a) Dipole interaction
b) Hydrogen bonding
c) Polar covalent bonding
d) Van der Waals forces
Answer: b
Which of the following is the weakest type of bond?
a) Covalent bond
b) Ionic bond
c) Metallic bond
d) Hydrogen bond
Answer: d
Weak residual forces between molecules not involving covalent or ionic bonding are known as:
a) Neutral bond
b) Non-polar bond
c) Electrovalent bond
d) Van der Waals bond
Answer: d
Which of the following is a polar covalent bond?
a) P–Cl
b) Ne–Cl
c) Cl–Cl
d) Ca–Cl
Answer: a
Which compound contains a covalent bond?
a) Na₂S
b) AlCl₃
c) NaH
d) MgCl₂
Answer: b
The octet rule is not obeyed by which molecule?
a) CO₂
b) H₂S
c) NH₃
d) BF₃
Answer: d
Which molecule contains a double covalent bond?
a) Cl₂
b) O₂
c) N₂
d) He₂
Answer: b
Water is a liquid but H₂S is a gas at room temperature because:
a) Oxygen forms stronger hydrogen bonds than sulfur
b) Oxygen is less electronegative than sulfur
c) Atomic radius of oxygen is smaller than sulfur
d) Oxygen has a larger atomic radius than sulfur
Answer: a
A covalent bond is also called a:
a) Molecular bond
b) Proton bond
c) Nuclear bond
d) Electron bond
Answer: a
Anions are formed by:
a) Loss of neutrons
b) Gain of protons
c) Gain of electrons
d) None of the above
Answer: c
An example of a covalent compound is:
a) Potassium chloride
b) Sodium chloride
c) Lead chloride
d) Carbon tetrachloride
Answer: d
Ionic solids are generally:
a) Good conductors in solid state
b) Low melting point substances
c) Soluble in polar solvents
d) High vapor pressure solids
Answer: c
The weakest bond among the following is:
a) Single bond
b) Double bond
c) Triple bond
d) Hydrogen bond
Answer: d
Consider the following about ionic compounds:
- Ionic compounds are soluble in alcohol
- Ionic compounds are good conductors in solid state
Which is true?
a) Only 1
b) Only 2
c) Both 1 and 2
d) Neither 1 nor 2
Answer: a
Which compound contains ionic, covalent, and coordinate bonds?
a) SO₂
b) H₂O
c) NH₄Cl
d) SO₃
Answer: c
Why do atoms form bonds?
a) To lower potential energy and gain stability
b) To form molecules
c) To increase potential energy and lose stability
d) To increase potential energy and gain stability
Answer: a
Which gas is most soluble in water at room temperature?
a) Nitrogen
b) Nitrous oxide
c) Ammonia
d) Carbon dioxide
Answer: c
NaCl is an example of:
a) Non-polar bond
b) Polar covalent bond
c) Metallic bond
d) Ionic bond
Answer: d
Which of the following has a covalent bond?
a) CsCl
b) CaO
c) N₂
d) Na₂O
Answer: c
What results from the hybridization of one s and one p orbital?
a) Three orbitals in a plane
b) Two orbitals 180° apart
c) Two perpendicular orbitals
d) Four tetrahedral orbitals
Answer: b
Ethyne (C₂H₂) is an example of a compound with a:
a) Triple bond
b) Single bond
c) Double bond
d) Coordinate bond
Answer: a
Which compound has a tetrahedral structure?
a) C₂H₄
b) C₂H₂
c) CH₄
d) None
Answer: c
The molecular geometry of CCl₄ is:
a) Tetrahedral
b) Triangular
c) Linear
d) Octahedral
Answer: a
The most polar bond among the following is:
a) N–Cl
b) O–F
c) C–F
d) N–N
Answer: c
The O–H bond in CH₃OH is:
a) Polar covalent
b) Ionic
c) Non-polar covalent
d) Cationic
Answer: a
Which of the following compounds is non-polar in nature?
a) HCl
b) H₂O
c) NH₄Cl
d) CCl₄
Answer: d