Chemical kinetics #Catalytic Properties#Transition Elements926Choose the best answerWhy does a catalyst increase the rate of a chemical reaction?AIncreases the kinetic energy of reactant molecules.BDecreases the activation energy by providing an alternative pathway.CIncreases the enthalpy change (ΔH) of the reaction.DIncreases the equilibrium constant. Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Chemical Bonding#Hybridization927Choose the best answerSp³ hybrid orbitals are formed by the mixing of: (Sindh MDCAT 2019)AOne s and two pBOne s and three pCOne s and one pDTwo s and two p Like 1 Discuss 0Share
Industrial ChemistryPeptide Bonds in Proteins928Choose the best answerProteins are primarily composed of amino acids linked together by:AGlycosidic bondsBPeptide bondsCHydrogen bondsDEster bonds Like 0 Discuss 0Share
Chemical BondingUnpaired Electrons929Choose the best answerThe number of unpaired electrons in NH₃ is:A0B1C3D4 Like 0 Discuss 0Share
LiquidsHydrogen Bonding in Biomolecules930Choose the best answerThe two strands of a DNA double helix are held together mainly by:AHydrogen bondingBIonic bondingCMetallic bondingDCovalent bonds between the two strands Like 0 Discuss 0Share