BUMHS MDCAT 2025 Chemistry#Chemical Bonding#Electronegativity1036Choose the best answerThe N–F–N bond in NF₃ is 101.9° – 102.4°, much lesser than in ammonia due to: (BUMHS MDCAT 2025)APresence of lone pair on FBhigh electronegativity of FClarge size of FDIts drawback of VSEPR Like 0 Discuss 0Share
SolidsElectrical Conductivity of Ionic Solids1037Choose the best answerSolid NaCl is a poor electrical conductor because:AIt contains no ionsBIt is covalentCIts ions are fixed in the latticeDIt contains no electrons at all Like 0 Discuss 0Share
UHS MDCAT 2024 Chemistry#Chemical Kinetics#Rate Law1038Choose the best answerIdentify the correct formula to calculate rate of reaction:AChange in concentration of substance / Time taken for the changeBTime taken for the change / Change in concentration of substanceC(Time taken for the change / Change in concentration of substance) × 100DTime taken for the change × Change in concentration of substance Like 0 Discuss 0Share
Chemistry of HydrocarbonsPhysical Properties of Alkanes1039Choose the best answerCompared with its straight-chain isomer, a more highly branched alkane generally has a:AHigher boiling pointBLower boiling pointCIdentical boiling pointDBoiling point independent of molecular shape Like 2 Discuss 0Share
Atomic StructureAufbau Principle and n + ℓ Rule1040Choose the best answerThe subshells 4f, 5d, 6p and 7s all have the same (n + ℓ) value. Which is filled first?A4fB6pC5dD7s Like 0 Discuss 0Share