Periodic TableShielding Effect and Orbital Penetration2896Choose the best answerThe shielding ability of electrons in orbitals of the same shell decreases in the order:As > p > d > fBf > d > p > sCp > d > f > sDf > p > s > d Like 0 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes2897Choose the best answerAmong elements with odd atomic numbers, what is the usual maximum number of stable isotopes?A1B2C3D4 Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryKeto-Enol Tautomerism2898Choose the best answerWhich compound cannot undergo ordinary keto-enol tautomerism?AAcetaldehydeBAcetoneCFormaldehydeDAcetylacetone Like 0 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Empirical and Molecular Formula#Stoichiometry2899Choose the best answerWhat is the molecular formula of pyridine? (UHS MDCAT 2023)AC₅H₅NBC₄H₅NCC₅H₆NDC₆H₆N Like 4 Discuss 1Share
Alcohols and PhenolsPreparation of Alcohols by Reduction of Carboxylic Acids2900Choose the best answerCH₃COOH + LiAlH₄/H₃O⁺ produces:ACH₃CHOBCH₃CH₂OHCCH₃COCH₃DCH₄ Like 0 Discuss 0Share