SINDH MDCAT 2019 CHEMISTRY#Alkyl Halides#Nucleophiles141Choose the best answerWhich one of the following is NOT a nucleophile? (Sindh MDCAT 2019)AH₂SBBF₃CNH₃DCN⁻ Like 0 Discuss 0Share
Sindh MDCAT 2021 Chemistry#Periodic Table#Periodic Trends142Choose the best answerThe element which is present in group IV–A and 3rd period, its atomic number is:A15B14C13D6 Like 0 Discuss 0Share
Chemical BondingIonic Bond Formation143Choose the best answerAn ionic bond is produced after transfer of:ANucleiBElectronsCNeutronsDProtons Like 0 Discuss 0Share
Chemistry of HydrocarbonsNitration of Benzene144Choose the best answerWhich reagent mixture is used for nitration of benzene?AConcentrated HNO₃ + concentrated H₂SO₄BHCl + HNO₃CH₂SO₄ + HClDHNO₃ + NaOH Like 0 Discuss 0Share
Atomic StructureIsotopes145Choose the best answerThe isotope ¹⁸O contains:A18 protonsB9 protons and 9 neutronsC8 neutrons and no protonsD8 protons and 10 neutrons Like 0 Discuss 0Share