StoichiometryMole Concept and Number of Molecules1486Choose the best answerWhich sample contains the greatest number of H₂O molecules?A18 mL liquid waterB0.18 g waterC0.00224 L water vapour at 273 K and 1 atmD4 × 10⁻³ mol water Like 0 Discuss 0Share
Chemical KineticsOrder of Reaction1487Choose the best answerFor a first-order reaction, which quantity remains constant during the reaction?AHalf-lifeBConcentration of reactantCRate of reactionDAmount of product formed Like 1 Discuss 0Share
Periodic TableMetallic Character1488Choose the best answerArrange Si, Be, Mg, Na and P in increasing order of metallic character:AP < Si < Be < Mg = NaBP < Be < Si < Mg < NaCP > Si > Be > Mg > NaDP < Si < Be < Mg < Na Like 0 Discuss 0Share
LiquidsIntermolecular Forces and Evaporation1489Choose the best answerIf the intermolecular-force strength follows A < B < C, which substance has the greatest tendency to evaporate?ABBCCA and B equallyDA Like 0 Discuss 0Share
SolidsCovalent-Network Solids1490Choose the best answerDiamond is a:AHydrogen-bonded solidBIonic solidCCovalent-network solidDAmorphous solid Like 0 Discuss 0Share