SINDH MDCAT 2019 CHEMISTRY#Enthalpy#Thermochemistry & Thermodynamics2586Choose the best answerThe change in heat energy of a chemical reaction at constant temperature and pressure is called: (Sindh MDCAT 2019)AEnthalpy changeBHeat of sublimationCInternal energy changeDHeat of formation Like 0 Discuss 0Share
Atomic StructureIsotopes2587Choose the best answerWhich number remains the same in all isotopes of an element?ANumber of protonsBNumber of neutronsCNumber of nucleonsDMass number Like 0 Discuss 0Share
Atomic StructureEnergy of Electron in Bohr Orbit2588Choose the best answerAccording to Bohr's model, the energy of an electron in the nth orbit of hydrogen is:AEₙ = −13.6/n⁴ eVBEₙ = −13.6/n³ eVCEₙ = −13.6/n² eVDEₙ = −13.6/n eV Like 0 Discuss 0Share
GasesBoyle's Law2589Choose the best answerBoyle's law describes the relationship between:AVolume and temperature at constant pressureBPressure and volume at constant temperatureCVolume and number of moles at constant temperature and pressureDPressure and temperature at constant volume Like 0 Discuss 0Share
MDCAT Chemistry Paper 2025#Benzene & Aromatic Compounds#Bonding in Benzene2590Choose the best answerRatio of σ bonds and π bonds present in benzene are: (IBA MDCAT 2025)A4:1B1:4C2:3D6:1 Like 5 Discuss 0Share