Fundamental Principles of Organic ChemistryCoal Tar1421Choose the best answerCoal tar is an important source of:AAromatic compoundsBAliphatic compounds onlyCCycloalkanes onlyDCarbohydrates Like 0 Discuss 0Share
SolidsAmorphous Solids1422Choose the best answerAmorphous solids are often described in elementary chemistry as supercooled liquids mainly because they:AHave a sharp melting pointBLack long-range crystalline orderCAre good electrical conductorsDAlways have high density Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Alkynes#Chemistry of Hydrocarbons1423Choose the best answerWhich of the following gases is used for welding purposes? (Sindh MDCAT 2019)AetheneBethaneCpropaneDethyne Like 0 Discuss 0Share
Atomic StructureValence Electrons in Ions1424Choose the best answerIf NA is the Avogadro constant, how many valence electrons are present in 4.2 g N³⁻ ions?A3.2NAB1.6NAC2.4NAD1.2NA Like 0 Discuss 0Share
Chemistry of HydrocarbonsTest for Terminal Alkynes1425Choose the best answerWhich compound forms a precipitate with ammoniacal AgNO₃?APropeneBPropaneCPropyneDBut-2-yne Like 1 Discuss 0Share