Chemical KineticsEffect of Catalyst on Activation Energy346Choose the best answerA reaction is catalysed by X. The primary kinetic effect of X is that it:ADecreases the rate constantBIncreases the equilibrium constantCDecreases the enthalpy changeDLowers the activation energy Like 0 Discuss 0Share
StoichiometryMass–Mole Conversion347Choose the best answerHow many moles of Na are present in 0.1 g Na?A4.3 × 10⁻³ molB4.01 × 10⁻² molC4.03 × 10⁻¹ molD4.3 × 10⁻² mol Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms348Choose the best answerHow many chlorine atoms are present in 2 mol Cl₂?A2 × 6.02 × 10²³ atomsB35.5 × 6.02 × 10²³ atomsC2 × 10²³ atomsD4 × 6.02 × 10²³ atoms Like 0 Discuss 0Share
LiquidsDensity of Ice and Water349Choose the best answerIce at 0°C is:ALess dense than liquid waterBMore dense than liquid waterCEqual in density to water at 4°CDCompletely independent of temperature Like 0 Discuss 0Share
Chemical equilibrium 01Chemical equilibrium #Kc350Choose the best answerFor the equilibrium CO₂(g) + H₂(g) ⇌ CO(g) + H₂O(l), what is the unit of Kc?Amol·dm⁻³Bmol⁻¹·dm³Cmol⁰·dm⁰ (no unit)Dmol²·dm⁻⁶ Like 0 Discuss 0Share