Trend in boiling temperatures of hydrogen halides?
Boiling point increases down group (HI highest)
Reaction when NH3(g) reacts with HCl(g)?
Acid–base reaction (A)
Graphene & graphite share which structural feature?
Hexagonal rings in layers (C)
Bond angle in BF3?
120° (D)
Which compound does NOT have hydrogen bonding?
Option without N-H/O-H/F-H → CO2 or similar (exact unknown from missing image)
Which molecule is linear?
CO2 (C)
Strongest interactions in solid boric acid?
Hydrogen bonds (B)
Second ionisation of bromine?
Br⁺(g) → Br²⁺(g) + e⁻ (D)
Successive ionisation energies for boron?
Set A: 738,1451,7733,10541,13629
Which pair of ions is isoelectronic?
Na⁺ and Mg²⁺ (D)
Largest ionic radius among isoelectronic ions?
N³⁻ (A)
Ionic bonding definition?
Electrostatic attraction between cations and anions (A)
Which substance is giant ionic at room temp?
Substance S (based on typical patterns)
Which substance conducts electricity solid & molten?
Substance R (metallic)
MgO bonding & structure?
Giant ionic (A)
Bond angles in graphene & graphite?
All 120° (D)
