Fundamental Concepts of ChemistryChemical Changes506Choose the best answerWhich of the following is a chemical change?AMelting of iceBDigestion of foodCFreezing of waterDCrushing of stone Like 0 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Mole Concept#Stoichiometry507Choose the best answerEqual moles of H₂, N₂, and O₂ contain:AN₂BH₂CO₂DNumber of molecules are equal Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Neutron Mass508Choose the best answerWhat is the approximate mass of a neutron in atomic mass units?A1.0073 uB1.0086 uC0.00055 uD1.673 u Like 0 Discuss 0Share
Periodic TableElectron Affinity509Choose the best answerWhich process represents electron affinity?AX(g) → X⁺(g) + e⁻BX⁺(g) + e⁻ → X(g)CX(g) + e⁻ → X⁻(g)DX⁻(g) → X(g) + e⁻ Like 0 Discuss 0Share
Chemistry of HydrocarbonsNitration of Benzene510Choose the best answerIn nitration of benzene, concentrated H₂SO₄ helps generate:ANO₂⁺BNO₃⁻CNH₄⁺DOH⁻ Like 1 Discuss 0Share