Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#X-Rays1236Choose the best answerWhich conditions are required to produce X-rays in a discharge tube?AHigh voltage and very low pressureBLow voltage and atmospheric pressureCLow voltage and high pressureDAtmospheric pressure without an applied potential Like 0 Discuss 0Share
GasesMolecular Kinetic Energy and Temperature1237Choose the best answerA closed system contains ice, liquid water and water vapour in equilibrium at the same temperature. According to the classical molecular interpretation, their average translational kinetic energy primarily depends on:APhysical state onlyBMolecular mass onlyCTemperatureDVolume only Like 0 Discuss 0Share
GasesBoyle's Law1238Choose the best answerFor a fixed amount of an ideal gas at constant temperature:AP/V = constantBV = constantCP = constantDPV = constant Like 0 Discuss 0Share
SolidsElectrical Conductivity of Ionic Solids1239Choose the best answerIonic compounds conduct electricity in the molten state because:AMolecules are formedBIons become free to moveCNeutral atoms are formedDNew electrons are produced Like 0 Discuss 0Share
Industrial chemistry Industrial chemistry MCQS#Enzymes#Macromolecules1240Choose the best answerWhy does very high temperature usually decrease enzyme activity?AIt increases substrate concentrationBIt causes enzyme denaturationCIt converts all enzymes into substratesDIt increases the enzyme's optimum pH Like 0 Discuss 0Share