StoichiometryMole Concept and Number of Atoms76Choose the best answerUsing Ar(Ar) = 40 and Ar(Ca) = 40, 20 g Ar contains the same number of atoms as:A40 g CaB30 g CaC20 g CaD10 g Ca Like 0 Discuss 0Share
Atomic StructureAtomic Orbitals77Choose the best answerAn atomic orbital is commonly represented as an:AElectron cloudBElectron seaCSubshell onlyDPrincipal shell Like 0 Discuss 0Share
Sindh MDCAT 2020 Chemistry#Atomic Structure#Charge-to-Mass Ratio78Choose the best answerWhich positive ion has the lowest charge-to-mass (e/m) ratio? (Sindh MDCAT 2020)ALi²⁺BH⁺CHe²⁺DBe²⁺ Like 0 Discuss 0Share1
MDCAT Chemistry Past Paper 2023#Amino Acids#Macromolecules79Choose the best answerWhich of the following is an amino acid? (MDCAT 2023)ABenzoic acidBPalmitic acidCAspartic acidDAniline Like 0 Discuss 0Share
GasesUniversal Gas Constant80Choose the best answerThe value of the universal gas constant R is 0.0821 in which units?AJ mol⁻¹ K⁻¹Batm·dm³·mol⁻¹·K⁻¹Ccal mol⁻¹ K⁻¹DPa·m³ only Like 0 Discuss 0Share