StoichiometryMolar Volume at STP1201Choose the best answerIf 2 mol gaseous H atoms are treated as an ideal monatomic gas, what volume do they occupy at STP (273 K and 1 atm)?A11.2 LB44.8 LC2 LD22.4 L Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#X-Rays1202Choose the best answerWho studied the X-ray spectra of elements from aluminium to gold in 1913?AWilhelm RoentgenBHenry MoseleyCHenri BecquerelDMarie Curie Like 1 Discuss 0Share
UHS MDCAT 2024 Chemistry#Alkali Metals#S- and P-Block Elements1203Choose the best answerThe difference of lithium from the other alkali metals is mainly because of:ALarge radius and low charge densityBSmall radius and low charge densityCLarge radius and high charge densityDSmall radius and high charge density Like 0 Discuss 0Share
Chemistry of HydrocarbonsMechanism of Electrophilic Aromatic Substitution1204Choose the best answerIn electrophilic aromatic substitution, benzene attacks the electrophile using its:Aσ electronsBπ electronsCLone-pair electronsDC–H σ bond only Like 1 Discuss 0Share
Chemistry of HydrocarbonsMechanism of Electrophilic Aromatic Substitution1205Choose the best answerThe intermediate formed after electrophilic attack on benzene is called:ACarbanionBArenium ion or σ-complexCFree radicalDAcetylide ion Like 1 Discuss 0Share