Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model476Choose the best answerWhat is the numerical value of the Bohr radius?A0.529 × 10⁻⁸ cmB1.602 × 10⁻¹⁹ cmC8.84 × 10⁻¹² cmD6.625 × 10⁻³⁴ cm Like 0 Discuss 0Share
Chemical BondingIonic Bond Formation477Choose the best answerWhich orbital is specifically responsible for formation of an ionic bond?Apₓ orbitalBpᵧ orbitalC2p orbital onlyDNo particular overlapping orbital is required Like 0 Discuss 0Share
Industrial ChemistryAuxochromes478Choose the best answerWhat is the principal role of an auxochrome in a dye molecule?AIt destroys the color of the dye.BIt enhances color and can improve attachment of the dye to a material.CIt acts as a polymerization catalyst.DIt removes dye from fabric. Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Atomic Structure#Quantum Numbers479Choose the best answerWhich orbitals are allowed in the M-shell? (Sindh MDCAT 2022)As onlyBs, p, d and fCs and p onlyDs, p and d Like 0 Discuss 0Share
GasesIsothermal Expansion480Choose the best answerDuring isothermal expansion of a fixed amount of an ideal gas: (1) Pressure decreases. (2) Average kinetic energy remains constant. (3) Average kinetic energy decreases. (4) Number of molecules increases.A(1) and (2)B(1), (2) and (4)C(1), (2) and (3)D(2) and (3) Like 0 Discuss 0Share