Which type of bond is the strongest among the following? a) C=C (double bond) b) C≡C (triple bond) c) C–C (single bond) d) All are equally strong Answer: b
Why does carbon tetrachloride (CCl₄) have zero dipole moment? a) Because carbon and chlorine are of similar size b) Because of its symmetrical tetrahedral structure c) Due to its planar shape d) Because both elements have similar electron affinity Answer: b
Which type of bond holds atoms together in a water molecule? a) Non-polar covalent bond b) Polar covalent bond c) Ionic bond d) Coordinate bond Answer: b
How many lone pairs of electrons are present in an N₂ molecule? a) 1 b) 3 c) 4 d) 2 Answer: d
Why does water have a high boiling point? a) Because it is ionic b) Because it is covalent c) Due to its high dielectric constant d) Due to strong hydrogen bonding Answer: d
Maximum number of hydrogen bonds a single water molecule can form is: a) 1 b) 2 c) 3 d) 4 Answer: d
Which of the following forms the strongest hydrogen bond? a) HCl b) HBr c) HI d) HF Answer: d
Which of the following is insoluble in water? a) Lead sulphate b) Zinc sulphate c) Potassium sulphate d) Sodium sulphate Answer: a
Which of the following is a covalent compound? a) KCl b) BaO c) CH₃Cl d) CaO Answer: c
Arrange the elements O, F, S, Cl, and N in increasing strength of hydrogen bonding: a) Cl < S < N < O < F b) Cl < F < S < N < O c) Cl < N < S < O < F d) Cl < O < S < N < F Answer: a
Why does molten NaCl conduct electricity? a) Due to free electrons b) Due to free ions c) Due to free molecules d) None of the above Answer: b
What type of bond is formed by sharing electrons between atoms? a) Ionic bond b) Covalent bond c) Coordinate bond d) None of these Answer: b
Which of the following statements about ionic compounds is correct?
Ionic compounds are insoluble in alcohol
They conduct electricity well in solid state a) Only 1 b) Only 2 c) Both 1 and 2 d) Neither 1 nor 2 Answer: a
Which compound contains an ionic bond? a) CH₄ b) CHCl₃ c) NaCl d) O₂ Answer: c
What is the hybridization of carbon in CO₂? a) sp b) sp² c) sp³ d) None Answer: a
Double bonds are present in which of the following? a) CH₄ b) C₂H₆ c) C₂H₄ d) C₂H₂ Answer: c
Which types of bonds are found in CuSO₄·5H₂O? a) Electrovalent and covalent b) Electrovalent and coordinate c) Electrovalent, covalent, and coordinate d) Covalent and coordinate covalent Answer: c
What kind of bond is formed by complete electron transfer? a) Ionic bond b) Covalent bond c) Coordinate bond d) Hydrogen bond Answer: a
Which of the following does NOT exhibit hydrogen bonding? a) CH₄ b) H₂O c) NH₃ d) HCOOH Answer: a
Which of the following is least soluble in water? a) NaCl b) Na₂S c) MgCl₂ d) MgS Answer: d
How is a cation formed? a) Gain of electrons b) Loss of electrons c) Gain of protons d) Loss of protons Answer: b
Which of the following is a covalent molecule? a) KCl b) NaCl c) PbCl₂ d) CCl₄ Answer: d
Electrons in the outermost shell of an atom are called: a) Valence protons b) Orbital protons c) Valence electrons d) Orbital electrons Answer: c
Ethylene (C₂H₄) is a: a) Polar molecule b) Ionic compound c) Covalent molecule d) Non-polar molecule Answer: c
Structure of ethylene is: a) Linear b) Tetrahedral c) Octahedral d) Trigonal planar Answer: d
Which type of bond becomes more covalent as electronegativity difference decreases? a) Polar b) Metallic c) Ionic d) Covalent Answer: d
