Sindh MDCAT 2021 Chemistry#Periodic Table#Periodic Trends161Choose 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 Formation162Choose the best answerAn ionic bond is produced after transfer of:ANucleiBElectronsCNeutronsDProtons Like 0 Discuss 0Share
Chemistry of HydrocarbonsNitration of Benzene163Choose the best answerWhich reagent mixture is used for nitration of benzene?AConcentrated HNO₃ + concentrated H₂SO₄BHCl + HNO₃CH₂SO₄ + HClDHNO₃ + NaOH Like 0 Discuss 0Share
Atomic StructureIsotopes164Choose the best answerThe isotope ¹⁸O contains:A18 protonsB9 protons and 9 neutronsC8 neutrons and no protonsD8 protons and 10 neutrons Like 0 Discuss 0Share
GasesReal Gases and van der Waals Equation165Choose the best answerGases show significant deviation from ideal behaviour at high pressure mainly because:AIntermolecular forces and molecular volume become significantBGas molecules begin to move only in one directionCThe actual volume of gas molecules becomes zeroDIntermolecular forces become completely negligible Like 0 Discuss 0Share