JEE Main202621 January 2026Morning ShiftChemistryp Block Elements (Group 13 & 14)Actual
Given below are two statements : Statement I : The number of pairs among [ SiO ₂, CO ₂ ], [ SnO , SnO ₂ ], [ PbO , PbO ₂ ] and [ GeO , GeO ₂ ] , which contain oxides that are both amphoteric is 2. Statement II : BF ₃ is an electron deficient molecule, can act as a Lewis acid, forms adduct with NH ₃ and has a trigonal planar geometry. In the light of the above statements, choose the correct answer from the options giv
Options
- AStatement I is true but Statement II is false
- BBoth Statement I and Statement II are true
- CBoth Statement I and Statement II are false
- DStatement I is false but Statement II is true
Correct answer
B. Both Statement I and Statement II are true
Step-by-step solution
Statement I: Checking amphoteric nature of oxide pairs: [SiO₂, CO₂] : Both acidic (non-metal oxides) [SnO, SnO₂] : Both amphoteric [PbO, PbO₂] : PbO is amphoteric but PbO₂ is predominantly acidic/oxidizing [GeO, GeO₂] : Both amphoteric (Ge is metalloid) 2 pairs have both oxides amphoteric. Statement I is true. Statement II: BF₃ has B with 6 valence electrons (electron deficient), acts as Lewis acid, forms BF₃ NH₃ adduct, has sp^2 hybridization giving trigonal planar geometry. Statement II is true.