quiz14 sec3

In the following equilibrium reaction: A(g) +B(g) ⇌ C(g) - heat

The amount of (B) can be increased by………………

• heating

• Cooling

• Removing amount of C

• B & c are correct

2. One of the following consumes reactants greatly for the following reaction:

2XY(g) + energy ⇌ X2(g) + Y2(g)

• Decreasing pressure

• Increasing pressure

• Increasing temperature

• Adding catalyst

The reaction of dil. Hydrochloric acid with iron acid with iron filings is a complete reaction, because ……………

• it occurs at a high temperature

• it occurs under high pressure

• The recombination of the produced hydrogen gas with iron(II) chloride is impossible

• The reactants and products are in equilibrium state

Among the properties of the catalyst is that it ………

• increases the forward reaction rate only

• increases the products concentration in equilibrium reactions

• increases the reaction activation energy

• is not changed at the end of the reaction

The increase of pressure increases the rate of the reactions which are characterized by …….

• Reaction included gaseous substances

• The reaction is accompanied by a reduction in the volume of the produced gases

• The reaction is reversible

• all the previous answers are right

If pressure increased in gaseous equilibrium reaction, so reaction is going in direction of ….

• Increasing no of moles

• Decreasing volume

• Increasing volume

• Decreasing energy

Which of the following equations represents a catalyzed reaction?

• A+B→D+B

• A+B→C+D

• A+A→D

• A→B+C

Methane gas combusts slowly in the atmospheric air at the room temperature, but when a piece of platinum is added to the vessel of the reaction which contains a mixture of methane and air, methane combusts instantaneously. What is the role of platinum in this reaction?

• Reducing the activation energy of the reaction

• Increasing the value of ∆H of the reaction

• Releasing the stored energy in the reactants

• Decreasing the rate of the reaction

Which of the following reactions is activated to the forward direction on decreasing the external pressure? ……………

• H2(g) + I2(v) ⇌2HI(g)

• PCl5(g)⇌PCl3(g) + Cl2(g)

• N2(g) + 3H2(g) ⇌2NH3(g)

• N2(g) + O2(g) ⇌2NO(g)

In the equilibrium reaction:

N2H4(g)⇌ N2(g) + 2H2(g) + Heat

[N2] can be increased by ……………

• decreasing the amount of N₂H₄

• increasing the amount of H₂

• raising the temperature

• reducing the pressure