LiquidsHydrogen Bonding and Volume Contraction56Choose the best answerWhen 50 mL ethanol is mixed with 50 mL water, the final volume may be less than 100 mL mainly because of:AVapour pressureBHydrogen bondingCBoilingDChemical reaction Like 0 Discuss 0Share
ElectrochemistryCalculation of Oxidation Number57Choose the best answerThe average oxidation state of carbon in glucose, C₆H₁₂O₆, is:A+4B−4C+6D0 Like 0 Discuss 0Share
Industrial ChemistryEnzymes as Biological Catalysts58Choose the best answerWhich statement best describes enzymes?AThey are completely consumed during reactions.BThey are biological catalysts that increase reaction rates.CThey are carbohydrates used only for energy storage.DThey function only at very high temperatures. Like 0 Discuss 0Share
GasesPlasma State59Choose the best answerPlasma consists mainly of:ANeutral atoms onlyBIonized particles and free electronsCMolecules fixed in positionDSolid particles only Like 0 Discuss 0Share
Alkyl HalidesStereochemistry of SN1 Reaction60Choose the best answerRacemization can occur in an SN₁ reaction because:AThe nucleophile attacks only from one side.BA planar carbocation intermediate is formed.CThe reaction is concerted.DThe leaving group can never separate from the substrate. Like 0 Discuss 0Share