Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model2226Choose the best answerAn electron falls from E₂ to the lower level E₁. What is the energy of the emitted photon?AE₁ − E₂BE₂ − E₁CE₁ + E₂DE₂/E₁ Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryNomenclature of Polyhydric Phenols2227Choose the best answerWhich sequence is entirely correct?ACatechol → Benzene-1,2-diol; Resorcinol → Benzene-1,3-diol; Hydroquinone → Benzene-1,4-diolBCatechol → Benzene-1,4-diol; Resorcinol → Benzene-1,2-diol; Hydroquinone → Benzene-1,3-diolCCatechol → Benzene-1,3-diol; Resorcinol → Benzene-1,4-diol; Hydroquinone → Benzene-1,2-diolDCatechol → Benzene-1,2,3-triol; Resorcinol → Benzene-1,3,5-triol; Hydroquinone → Benzene-1,2,4-triol Like 0 Discuss 0Share
GasesRoot Mean Square Speed2228Choose the best answerFor a fixed gas, the root mean square speed is proportional to:ATB√TC1/TDT² Like 0 Discuss 0Share
Atomic StructureProperties of Isotopes2229Choose the best answerIsotopes of an element generally have:ASimilar chemical properties but different physical propertiesBIdentical chemical and physical propertiesCSimilar physical properties but different chemical propertiesDCompletely different chemical and physical properties Like 0 Discuss 0Share
GasesCharles's Law2230Choose the best answerA gas occupies 300 mL at 37°C. It is cooled to −3°C at constant pressure. What is its final volume?A350 mLB270 mLC261 mLD135 mL Like 0 Discuss 0Share