Chemical BondingMolecular Geometry and VSEPR Theory1596Choose the best answerHeavy water, D₂O, contains two bond pairs and two lone pairs around oxygen. Its molecular shape is:ATrigonal planarBTrigonal pyramidalCBentDSquare planar Like 0 Discuss 0Share
Aldehydes and KetonesTests for Aldehydes and Ketones1597Choose the best answerWhich test or tests can distinguish benzaldehyde from acetophenone?ATollens' testBFehling's testCIodoform testDTollens' test and iodoform test Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Subatomic Particles1598Choose the best answerApproximately what percentage of an atom’s mass is concentrated in its nucleus?A99.00%B99.94%C95.50%D90.00% Like 0 Discuss 0Share
Stoichiometry#Atomic Mass Unit1599Choose the best answerOne unified atomic mass unit (1 u) is approximately equal to:A1.66 × 10⁻²⁴ gBapproximately 1.66 × 10⁻²⁷ gCapproximately the mass of one protonDA and C Like 0 Discuss 0Share
Stoichiometry#Relative Atomic Mass1600Choose the best answerAn atom is 15 times heavier than 1/12 of the mass of a carbon-12 atom. What is its relative atomic mass?A12B15C20D30 Like 0 Discuss 0Share