Industrial ChemistryAuxochromes426Choose 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 Numbers427Choose 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 Expansion428Choose 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
Sindh MDCAT 2020 Chemistry#Magnetic Properties#Transition Elements429Choose the best answerAmong the following 3d-series ions, which has the greatest number of unpaired electrons?ACr³⁺BTi³⁺CV³⁺DZn²⁺ Like 0 Discuss 0Share
SolidsCrystalline Solids430Choose the best answerA crystalline solid characteristically has:AA sharp melting pointBNo melting pointCA completely disordered structureDNo long-range order Like 0 Discuss 0Share