Sindh MDCAT 2022 Chemistry#Isomorphism#Solids866Choose the best answerQ.77 The two crystals NaNO₃ & CaCO₃ are both trigonal, they are:AIsomersBPolymorphsCAllotropesDIsomorph Like 0 Discuss 0Share
Basic Concepts of ChemistryElements, Compounds and Mixtures867Choose the best answerIn known elements, the maximum number is of:AMetalsBNon-metalsCMetalloidsDNone of these Like 1 Discuss 0Share
Atomic StructureIsotopes868Choose the best answerWhich element has two major naturally occurring stable isotopes?AAgBOCCDCs Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryOctane Number and Knocking869Choose the best answerWhich fuel is least likely to produce knocking in a petrol engine?ALow-octane petrolBHigh-octane petrolCDieselDKerosene Like 0 Discuss 0Share
StoichiometryAvogadro's Law and Gas Volume870Choose the best answerA stoichiometric mass–volume calculation for gases mainly connects moles with gas volume through:ALaw of definite compositionBGay-Lussac's law onlyCAvogadro's lawDLaw of multiple proportions Like 0 Discuss 0Share