Chemical BondingMolecular Geometry and VSEPR Theory1471Choose the best answerThe molecular shape of PH₃ is:ATrigonal planarBTetrahedralCTrigonal pyramidalDLinear Like 0 Discuss 0Share
Sindh MDCAT 2021 Chemistry#Carboxylic Acids#Grignard Reagent1472Choose the best answerWhen CO₂ reacts with Grignard reagent it gives:AAlcoholBCarboxylic acidCAlkaneDEster Like 0 Discuss 0Share
SolidsTransition Temperature1473Choose the best answerThe temperature at which two allotropic forms coexist in equilibrium is called:AMelting pointBBoiling pointCTransition temperatureDCritical temperature Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Bohr Model1474Choose the best answerCalculate the radius of the fourth Bohr orbit in a hydrogen atom.A2.11 ÅB4.23 ÅC8.46 ÅD16.92 Å Like 0 Discuss 1Share
Chemical KineticsSurface Area and Reaction Rate1475Choose the best answerIf the surface area of a solid reactant is increased, the order of reaction:ANecessarily increasesBNecessarily decreasesCRemains a property of the rate law and does not automatically changeDAlways becomes zero Like 0 Discuss 0Share