Fundamental Principles of Organic ChemistryCatenation1176Choose the best answerCarbon shows strong catenation mainly because:AC–C bonds are ionic.BC–C bonds are strong due to effective orbital overlap.CCarbon forms only double bonds.DC–C bonds form only inside living organisms. Like 0 Discuss 0Share
Atomic StructureFormation of Ions1177Choose the best answerA positive ion is formed from a neutral atom by:AIncreasing its nuclear chargeBGaining protonsCLosing electronsDLosing protons Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Hess's Law#Thermochemistry & Thermodynamics1178Choose the best answerThe net heat change in a chemical reaction is same, whether it is brought about in two or more different ways in one or several steps. It is known as: (Sindh MDCAT 2019)AHenry's lawBHess's lawCJoule's principleDDalton's law Like 0 Discuss 0Share
StoichiometryMole–Volume Stoichiometry1179Choose the best answer0.25 mol N₂ reacts with excess H₂: N₂ + 3H₂ → 2NH₃ The volumes of H₂ consumed and NH₃ produced at STP (273 K and 1 atm) are respectively:A16.8 L and 11.2 LB33.6 L and 11.2 LC11.2 L and 2.8 LD22.4 L and 5.6 L Like 0 Discuss 0Share
Classification of Hydrocarbons and IsomerismClassification of hydrocarbons, structural & geometrical isomerism#Classification of Organic Compounds#Fundamental Principles of Organic Chemistry1180Choose the best answerWhich compound contains a heteroatom but is not heterocyclic?APyridineBFuranCThiopheneDAniline Like 0 Discuss 0Share