SZABMU MDCAT 2025 Chemistry#Electrochemistry#Oxidation Number191Choose the best answerOxidation state of Tungsten in Na₂WO₄·H₂O is: (SZABMU MDCAT 2025)A+5B+6C+8DZero Like 0 Discuss 0Share
LiquidsHydrogen Bonding192Choose the best answerH₂O is liquid while H₂S is gaseous at room temperature mainly because:AOxygen contains lone pairsBH–O bonds are ionicCWater forms strong intermolecular hydrogen bondsDH₂S has stronger hydrogen bonding Like 0 Discuss 0Share
Chemical BondingMolecular Geometry and Lone Pairs193Choose the best answerFor a regular geometry produced only by bond pairs around the central atom, which statement is necessarily true?AThe central atom has no lone pair causing distortionBThe species can never donate an electron pairCThe species must always be a Lewis acidDThe molecule must be ionic Like 0 Discuss 0Share
StoichiometryAvogadro's Law194Choose the best answerWhich pair contains equal numbers of molecules?A1 g H₂ and 44 g CO₂B1 dm³ O₂ and 1 dm³ N₂ at the same temperature and pressureC1 mol H₂ and 0.5 mol HeDAll of these Like 0 Discuss 0Share
LiquidsBoiling Point195Choose the best answerA liquid boils when:AIts vapour pressure equals the external pressureBIts vapour pressure is always less than atmospheric pressureCIts vapour pressure becomes zeroDIts intermolecular forces disappear completely Like 0 Discuss 0Share