Aldehydes and KetonesIodoform Test2281Choose the best answerWhich compound does NOT give a positive iodoform test?APentan-2-oneBEthanolCEthanalDPentan-3-one Like 0 Discuss 0Share
Industrial chemistry Industrial chemistry MCQS#Macromolecules#Polymers2282Choose the best answerWhich monomer–polymer pair is correctly matched?AEthene → PolypropyleneBPropene → PolyethyleneCStyrene → PolystyreneDAcrylonitrile → PVC Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Energy2283Choose the best answerCalculate the energy of an electron in the L-shell of hydrogen.A−2.18 × 10⁻¹⁸ JB−5.45 × 10⁻¹⁹ JC−1.09 × 10⁻¹⁸ JD−3.28 × 10⁻¹⁹ J Like 0 Discuss 0Share1
LiquidsMolar Enthalpy of Vaporization2284Choose the best answerThe heat required to convert one mole of a liquid completely into vapour at constant temperature is called:AMolar enthalpy of vaporizationBHeat of crystallizationCHeat of fusionDHeat of sublimation Like 0 Discuss 0Share
Alkyl HalidesNucleophilic Substitution with Ammonia2285Choose the best answerThe reaction C₂H₅I + 2NH₃ → C₂H₅NH₂ + NH₄I is an example of:AElectrophilic additionBElectrophilic substitutionCNucleophilic additionDNucleophilic substitution Like 0 Discuss 0Share