Reversible Reactions

Q.

What is quasi-static process?

Q. Which of the given options is not a general characteristic of equilibrium involving a physical process?

1. Equilibrium is possible only in a closed system at a given temperature.
2. The opposing processes occur at the same rate and there is a dynamic but stable condition.
3. All the physical processes stop at equilibrium.
4. All measurable properties of the system remain constant.

Q. On increasing the concentration of reactants in a reversible reaction, the equilibrium constant will

1. depend on the concentration
2. increase
3. remain unchanged
4. decrease

Q. Which of these given options is a characteristic of reversible reaction?

1. Number of moles of reactants and products are equal
2. It can be influenced by a catalyst
3. It can never proceed to completion
4. None of the given options

Q. The rate at which the reaction proceeds is directly proportional to the product of the active masses of

1. products
2. reactants
3. catalysts
4. none of above

Q.

How can You Tell if a Reaction is Reversible?

Q. Five solutions A, B, C, D, and E when tested with universal indicator showed pH as 4, 1, 11, 7, and 9, respectively.
1. Arrange the pH in increasing order of hydrogen-ion concentration.
2. Which solution is
(a) neutral?
(b) strongly alkaline?
(c) strongly acidic?
(d) weakly acidic?
(e) weakly alkaline? [3 marks]

Q. For a reversible system, when the pressure of the reacting system in equilibrium is increased then the system shifts to the side of the reaction with a fewer number of gas molecules.

1. True
2. False

Q. Most metal oxides are ______ in nature.

1. acidic
2. basic
3. amphoteric
4. neutral

Q. The characteristic(s) observed during the reaction between iron sulphate and zinc is/are:

1. colour change
2. formation of a precipitate
3. absorption of heat
4. evolution of heat

Q. Which among the following statements are correct for the given redox reaction:
$P{b}_3{O}_4+8HCl\stackrel{Heat}{\to }3PbC{l}_2+C{l}_2+4H_{2}O$
I. $HCl$ is oxidised
II. $HCl$ is reduced
III. $P{b}_3{O}_4$ is reduced
IV. $P{b}_3{O}_4$ is oxidised

1. I only
2. II only
3. I & III
4. II & IV

Q. Which of the following reacts with oxygen on strong heating but not with water at all?

1. Magnesium
2. Copper
3. Gold
4. Sodium

Q. What will be $\text{A+B+C}$ if the following reaction is balanced?

${\text{AFeCl}}_3\text{(aq)}+\text{BMgO}\text{(s)}\to {\text{Fe}}_2{\text{O}}_3\text{(s)}+{\text{CMgCl}}_2\text{(aq)}$

1. 8
2. 9
3. 7
4. 10

Q. Which of the following reacts moderately with water?

1. Sodium
2. Copper
3. Iron
4. Magnesium

Q.

What is the change taking place in the following processes ?

1. Irreversible physical change
2. Reversible chemical change
3. Reversible physical change
4. Irreversible chemical change