Equilibrium Test

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Equilibrium Test - 61

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following solution mixture will show resistance to the small addition of acids?

A
$$500ml\ of\ 0.1N\ CH_{3}COOH+500ml\ of\ 0.1N\ NaOH$$

B
$$500ml\ of\ 0.1N\ CH_{3}COOH+500ml\ of\ 0.1N\ HCl$$

C
$$500ml\ of\ 0.1N\ CH_{3}COOH+500ml\ of\ 0.2N\ NaOH$$

D
$$500ml\ of\ 0.2N\ CH_{3}COOH+500ml\ of\ 0.1N\ NaOH$$
Question 2
1 / -0

Percentage dissociation of a $$0.024 M$$ solution of a weak acid $$HA$$ is:
($${K_a}=2 \times 10^{-3}$$)

A
$$0.25 \%$$

B
$$ \approx 29 \%$$

C
$$25 \%$$

D
$$ \approx 0.25 \%$$
Question 3
1 / -0

Directions For Questions

The dissociation constant of acetic acid is $$2.0\times 10^{-5}$$. An aqueous solution of acetic acid is prepared by dissolving $$0.7$$ millimole acetic acid in sufficient water to get $$10^{3}\ m$$ of solution at $$25^{o}C$$.

...view full instructions

What is the concentration of unionized acetic acid in the solution?

A
$$0$$

B
$$4.9\times 10^{-10}\ M$$

C
$$7\times 10^{-8}\ M$$

D
$$2.45\times 10^{-10}\ M$$
Question 4
1 / -0

Which of the following is the correct order of hydrated radii?

A
$$Li^{+}$$ < $$Na^{+} $$<$$K^{+} $$<$$ Rb^{+}$$ < $$Cs^{+}$$

B
$$Rb^{+}$$ < $$Na^{+} $$<$$Li^{+} $$<$$ Cs^{+}$$ < $$K^{+}$$

C
$$Cs^{+}$$ < $$Rb^{+} $$<$$K^{+} $$<$$ Na^{+}$$ < $$Li^{+}$$

D
$$Li^{+}$$ < $$K^{+} $$<$$Na^{+} $$<$$ Rb^{+}$$ < $$Cs^{+}$$
Question 5
1 / -0

Conversion of ozone into oxygen is an exothermic reaction what are the favourable condition of temperature and pressure for the dissociation of ozone?

A
High temperature and high pressure.

B
Low temperature and high pressure.

C
High temperature and low pressure.

D
Low temperature and low pressure.
Question 6
1 / -0

Which of the following mixtures will be a buffer solution when dissolved in $$500.00\ ml$$ of water?

A
$$0.200$$ mol of aniline and $$0.200$$ mol of $$HCl$$

B
$$0.200$$ mol of aniline and $$0.400$$ mol of $$NaOH$$

C
$$0.200$$ mol of $$NaCl$$ and $$0.100$$ mol of $$HCl$$

D
$$0.200$$ mol of aniline and $$0.100$$ mol of $$HCl$$
Question 7
1 / -0

The following reversible reaction is at equilibrium.

$$[Cu(NH_3)_4]^{2+} + SO_3^{2-} \rightleftharpoons [Cu(NH_3)_2SO_3]+NH_3$$

What would not happen if ammonia is added-

A
$$[SO_3^{2-}]$$ would increase

B
$$[Cu(NH_3)_3SO_3]$$ would increase

C
The value of equilibrium constant would not change

D
$$[Cu(NH_3)_4]^{2+}$$ would decrease
Question 8
1 / -0

What $$[H^+]$$ must be maintained in a saturated solution to ppt. $$Pb^{+2}$$ but not $$Zn^{+2}$$ from a solution in which each ion is present at a concentration of $$0.01\ M$$?
Given, $$K_{sp}$$ for $$H_2S=1.1\times 10^{-22}$$, $$K_{sp}$$ for $$ZnS=10^{-21}$$.

A
$$3.3\times 10^{-4}$$

B
$$3.3\times 10^{-2}$$

C
$$6.6\times 10^{-2}$$

D
$$6.6\times 10^{-4}$$

Solution
Question 9
1 / -0

Consider the following reaction.
$$C(S, diamond) \leftrightharpoons C(S, graphite) +$$ heat
Choose the correct option.

A
An increase in temperature will shift the equilibrium to the right, and so will an increase in pressure.

B
An increase in temperature will shift the equilibrium to the left, and so will an increase in pressure.

C
An increase in temperature will shift the equilibrium to the left, and one in pressure to the right.

D
Any increase in temperature and pressure will not shift the equilibrium.
Question 10
1 / -0

Which mixture forms a buffer when dissolved in 1 L of water?

A
0.2mol NaOH + 0.2 mol HBr

B
0.2mol NaCl + 0.3mol HCl

C
0.4 mol $$HNO_2$$ + 0.2mol NaOH

D
0.5 mol $$NH_3$$ + 0.5mol HCl

Solution

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Equilibrium Test - 61

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Equilibrium Test - 61

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Question 1

$$500ml\ of\ 0.1N\ CH_{3}COOH+500ml\ of\ 0.1N\ NaOH$$

$$500ml\ of\ 0.1N\ CH_{3}COOH+500ml\ of\ 0.1N\ HCl$$

$$500ml\ of\ 0.1N\ CH_{3}COOH+500ml\ of\ 0.2N\ NaOH$$

$$500ml\ of\ 0.2N\ CH_{3}COOH+500ml\ of\ 0.1N\ NaOH$$

Question 2

$$0.25 \%$$

$$ \approx 29 \%$$

$$25 \%$$

$$ \approx 0.25 \%$$

Question 3

$$0$$

$$4.9\times 10^{-10}\ M$$

$$7\times 10^{-8}\ M$$

$$2.45\times 10^{-10}\ M$$

Question 4

$$Li^{+}$$ < $$Na^{+} $$<$$K^{+} $$<$$ Rb^{+}$$ < $$Cs^{+}$$

$$Rb^{+}$$ < $$Na^{+} $$<$$Li^{+} $$<$$ Cs^{+}$$ < $$K^{+}$$

$$Cs^{+}$$ < $$Rb^{+} $$<$$K^{+} $$<$$ Na^{+}$$ < $$Li^{+}$$

$$Li^{+}$$ < $$K^{+} $$<$$Na^{+} $$<$$ Rb^{+}$$ < $$Cs^{+}$$

Question 5

High temperature and high pressure.

Low temperature and high pressure.

High temperature and low pressure.

Low temperature and low pressure.

Question 6

$$0.200$$ mol of aniline and $$0.200$$ mol of $$HCl$$

$$0.200$$ mol of aniline and $$0.400$$ mol of $$NaOH$$

$$0.200$$ mol of $$NaCl$$ and $$0.100$$ mol of $$HCl$$

$$0.200$$ mol of aniline and $$0.100$$ mol of $$HCl$$

Question 7

$$[SO_3^{2-}]$$ would increase

$$[Cu(NH_3)_3SO_3]$$ would increase

The value of equilibrium constant would not change

$$[Cu(NH_3)_4]^{2+}$$ would decrease

Question 8

$$3.3\times 10^{-4}$$

$$3.3\times 10^{-2}$$

$$6.6\times 10^{-2}$$

$$6.6\times 10^{-4}$$

Solution

Question 9

An increase in temperature will shift the equilibrium to the right, and so will an increase in pressure.

An increase in temperature will shift the equilibrium to the left, and so will an increase in pressure.

An increase in temperature will shift the equilibrium to the left, and one in pressure to the right.

Any increase in temperature and pressure will not shift the equilibrium.

Question 10

0.2mol NaOH + 0.2 mol HBr

0.2mol NaCl + 0.3mol HCl

0.4 mol $$HNO_2$$ + 0.2mol NaOH

0.5 mol $$NH_3$$ + 0.5mol HCl

Solution

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