Reaction that can proceed in both directions What is a reversible reaction? Forward Reaction Reaction that has stopped Reaction that can proceed in both directions Reverse Reaction

Yellow Green Blue Orange What colour will the equilibrium mixture if concentrated sulfuric acid is added to Yellow Green Orange Blue

 

Why is chemical equilibrium described as a dynamic state? Reaction is completed Reaction has stopped Reaction has not stopped No Reactants left

Explain the colour change observed on cooling the above reaction mixture if the forward reaction is endothermic. Blue as equilibrium moves to right Pink as equilibrium moves to left Purple as equilibrium moves midway between left and right Colourless as both coloured reactants react when mixture is cooled

Contact Process Which is the following is a reversible reaction Burning of Magnesium Contact Process Addition of Sodium to Water Addition of Zinc to Acid

Which of these statements is not true about Dynamic Equilibrium Position of Equilibrium can be Changed Equilibrium is always at half way point Forward and backward reactions occur at same rate Only reversible reactions reach dynamic equilibrium

What is the effect of a catalyst on a reversible reaction? Increases yield of Reactants Increases yield of Products Lowers yield of Reactants Lowers Activation Energy

Le Chatelier Bronsted Lowry Arnhenius Name the scientist who investigated the affect of stress on a reversible reaction at equilibrium? Fritz Haber Le Chatelier Bronsted Lowry Arnhenius

Which of the following decreases the concentration of Nitrogen? Decrease concentration of Hydrogen Increase concentration of Ammonia Increase pressure in reaction vessel Increase temperature of reaction vessel

Temperature does not matter Excessive Temperature Predict the levels of temperature needed to maximise the yield of ammonia when equilibrium is established. Temperature does not matter Excessive Temperature Low Temperature High Temperature

What is the name of the process involved in the oxidation of sulfur dioxide to sulfur trioxide Reforming Process Reduction Process Contact Process Haber Process

Change in Concentration of Reactants Change in Pressure Which of the following does not affect position of Equilibrium Change in Temperature Addition of Catalyst Change in Concentration of Reactants Change in Pressure

Which of the following is false about a reaction at equilibrium Temperature always increases rate of forward reaction Direction of shift depends on sign of ∆H Changing temperature affects rate of forward and backward reactions Temperature changes Equilibrium Constant Value

Gets larger Becomes zero Gets smaller Does not change State, if the red colour fades when the test tube containing the above equilibrium mixture is placed in an ice-water bath, how the value of Kc changes. Gets smaller Gets larger Becomes zero Does not change