Chemical Bonding — Set 4
Chemistry · रासायनिक बंधन · Questions 31–40 of 40
The measure of an atom's ability to attract shared electrons is called?
Correct Answer: A. Electronegativity
• **Electronegativity** = Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Lattice energy; C: Electron affinity; D: Ionization potential
Which molecule is a well-known exception to the octet rule with more than 8 electrons?
Correct Answer: C. PCl5
• **PCl5** = Phosphorus pentachloride (PCl5) is an. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: H2O; B: CH4; D: NH3
What type of bonding is present in solid Iodine?
Correct Answer: D. Covalent and Van der Waals
• **Covalent and Van der Waals** = In solid Iodine, the atoms within a molecule are covalently bonded. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Metallic; B: Ionic; C: Coordinate
Which hybridisation is present in the carbon atoms of diamond?
Correct Answer: C. sp3
• **sp3** = Each carbon atom in diamond undergoes sp3 hybridisation. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: sp2; B: sp; D: sp3d
What type of bond is formed when p-orbitals overlap sideways?
Correct Answer: D. Pi bond
• **Pi bond** = A pi bond is formed by the lateral or sideways overlap of atomic orbitals. • **atomic** — A pi bond is formed by the lateral or sideways overlap of atomic orbitals • 💡 Wrong-option analysis: A: Ionic bond; B: Sigma bond; C: Metallic bond
Which of the following ions has a noble gas configuration?
Correct Answer: C. Mg2+
• **Mg2+** = The magnesium ion (Mg2+) has 10 electrons, which is the same as the noble gas Neon. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Cu+; B: Zn2+; D: Fe2+
The energy required to separate one mole of an ionic compound into gaseous ions is?
Correct Answer: B. Lattice energy
• **Lattice energy** = Lattice energy is a measure of the strength of the forces holding an ionic solid together. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Hydration energy; C: Ionization energy; D: Bond energy
Which molecule contains only single covalent bonds?
Correct Answer: B. Ethane
• **Ethane** = Ethane (C2H6) contains only single covalent bonds between carbon and hydrogen atoms. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Ethyne; C: Benzene; D: Ethene
Which property of metals is explained by the mobility of valence electrons?
Correct Answer: B. Lustre and conductivity
• **Lustre and conductivity** = The shiny appearance (lustre) and electrical conductivity of metals are due to free electrons. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Brittleness; C: Low melting point; D: Insulation
A covalent bond is formed by?
Correct Answer: A. Sharing of electrons
• **Sharing of electrons** = A covalent bond is formed when two atoms share one or more pairs of electrons. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Metallic bonding; C: Donation of protons; D: Transfer of electrons