Fundamental Principles of Organic ChemistryOctane Number and Knocking1521Choose the best answerKnocking in petrol engines can be reduced by:ACyclisationBBranchingCAromatisationDAll of these Like 0 Discuss 0Share
BUMHS MDCAT 2025 Chemistry#Stoichiometric Calculations#Stoichiometry1522Choose the best answerConsider the reaction: 2Na + Cl₂ → 2NaCl. If 4 moles of Na and 2 moles of Cl₂ are reacted, how much Cl₂ will remain unreacted? (BUMHS MDCAT 2025)A0 molB0.5 molC1 molD1.5 mol Like 0 Discuss 0Share
Chemical equilibrium 01Chemical equilibrium #Dynamic Equilibrium1523Choose the best answerOn a concentration–time graph, what does a horizontal part of both curves indicate?AThe reaction has stoppedBEquilibrium has been establishedCReactants are completely consumedDProducts are no longer formed Like 0 Discuss 0Share
Periodic TableAtomic Radius Trend1524Choose the best answerGallium has a slightly smaller atomic radius than aluminium mainly because of:AGreater shielding by 4p-electronsBPoor shielding by intervening 3d-electronsCSmaller nuclear charge of galliumDAbsence of d-electrons in gallium Like 0 Discuss 0Share
StoichiometryMole#Mole Concept1525Choose the best answerWhich statement is correct for 98 g (1 mol) of H₂SO₄?Atwice the Avogadro's number of oxygen atomsBfour times the Avogadro's number of atomsCtwice the Avogadro's number of hydrogen atomsDB and C Like 0 Discuss 0Share