Equilibrium Test

Result

Equilibrium Test - 43

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Sodium chloride is purified by passing hydrogen chloride gas in an impure solution of sodium chloride. It is base on

A
Buffer action

B
Common ion effect

C
Association of salt

D
Hydrolysis of salt

Solution

$$\text{Purification of NaCl by the passage of HCl through brine is based on the common ion effect.}$$
$$\text{HCl is a strong electrolyte and provides an ion }(Cl^−)\text{ that is common to that provided by the weak electrolyte.}$$$$\text{Thus, the ionization of weak electrolytes is suppressed.}$$
Question 2
1 / -0

Which one is buffer solution

A
$$[PO_{4}^{-}][HPO^{-}_{4}]$$

B
$$[PO_{3}^{3-}][H_{2}PO_{4}^{-}]$$

C
$$[HPO_{4}^{-}][H_{2}PO_{4}^{-}]$$

D
All of these

Solution

[Normal salt+acidic salt] is a buffer solution.

$$\underset {normal\ salt}{[PO_{3}^{3-}]} \underset {acidic\ salt}{[H_{2}PO_{4}^{-}]}$$

Option B is correct.
Question 3
1 / -0

The degree of dissociation in a weak electrolyte increases________

A
on increasing dilution

B
on increasing pressure

C
on decreasing dilution

D
none of these

Solution

In weak electrolyte the degree of dissociation is very small. So it increases with increasing dilution.

Option A is correct.
Question 4
1 / -0

Which one of the following is not a buffer solution?

A
$$0.8\ M\ H_2S +0.8\ M\ KHS$$

B
$$2\ M\ C_6H_5 NH_2 +2 M\ C_6H_5\ NH_3^+ Br$$

C
$$3\ M\ H_2CO_3+ 3\ M\ KHCO_3$$

D
$$0.05\ M\ KClO_4 + 0.05\ M\ HClO_4$$

Solution

Buffer solutions can be obtained by mixing a weak acid with its salt formed with a strong base or by mixing a weak base with its salt formed with a strong acid.

Because $$HClO_4$$ is a strong acid. While buffer is a mixture of weak acid and their salt.
Question 5
1 / -0

Which of the following will produce a buffer solution when mixed in equal volumes?

A
$$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.1 mol \ dm^{-3}$$ $$HCl$$.

B
$$0.05 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.1 mol\ dm^{-3}$$ $$HCl$$.

C
$$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.05 mol\ dm^{-3}$$ $$HCl$$.

D
$$0.1 mol\ dm^{-3}$$ $$CH_{4}COONa$$ and $$0.1 mol\ dm^{-3}$$ $$NaOH$$.

Solution

$$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.05 mol\ dm^{-3}$$ $$HCl$$.
As a mixture of ammonium chloride and ammonium hydroxide acts as a buffer around pH $$9.25$$.
Question 6
1 / -0

At $$25^{o}C$$ the $$pH$$ value of a solution is $$6$$. The solution is

A
Basic

B
Acidic

C
Neutral

D
Both (b) and (c)

Solution

pH value of 0-7 is acidic
ph=7 nutral
pH 7- 14 basic
Question 7
1 / -0

A system at equilibrium is described by the equation of fixed temperature $$T$$.
$$SO_2Cl_2(g) \rightleftharpoons SO_2(g) +Cl_2(g)$$
What effect will an increases in the total pressure caused by a decrease in volume have on the equilibrium?

A
Concentration of $$SO_2Cl_2(g)$$ increases

B
Concentration of $$SO_2(g)$$ increases

C
Concentration of $$Cl_2(g)$$ increases

D
Concentration of all gases increases

Solution

Concentration of all gases increases and equilibrium shifts towards less no. of moles but new equilibrium concentration of every gas would be higher than earlier.
Question 8
1 / -0

A solution that resists changes in pH upon the addition of a small amount of strong acid or strong base known as_____

A
A colloid

B
A crystalloid

C
A buffer

D
A indicator

Solution

Because buffer solution have a constant $$pH$$.
Question 9
1 / -0

Assertion: Equilibrium constant of a reaction increases if temperature is increased.
Reason: The forward reaction becomes faster with increase of temperature.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

C
Assertion is correct but Reason is incorrect

D
Both Assertion and Reason are incorrect

E
If both Assertion and Reason are false.

Solution

Effect of temperature on equilibrium constant $$K$$ depends upon whether the reaction is exothermic or endothermic.

hence If both Assertion and Reason are false.
Question 10
1 / -0

The reaction, $$SO_2+Cl_2\rightleftharpoons SO_2 Cl_2$$ is exothermic and reversible. A mixture of $$SO_2(g). Cl_2(g)$$ and $$SO_2 , Cl_2(g)$$ is equilibrium in a closed container. Now a certain quantity of extra $$SO_2$$ is introduced into the container, the volume remaining the same. Which of the following is/are true?

A
The pressure inside the container will not change

B
The temperature will not change

C
The temperature will increase

D
The temperature will decrease

Solution

$$SO_2+Cl_2 \rightleftharpoons SO_2Cl_2 +$$Heat. On adding $$SO_2$$ the equilibrium will shift forward i.e, more heat will be evolved. So temperature will increase.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Equilibrium Test - 43

Result

Equilibrium Test - 43

Score

-

Rank

-

SHARING IS CARING

Question 1

Buffer action

Common ion effect

Association of salt

Hydrolysis of salt

Solution

Question 2

$$[PO_{4}^{-}][HPO^{-}_{4}]$$

$$[PO_{3}^{3-}][H_{2}PO_{4}^{-}]$$

$$[HPO_{4}^{-}][H_{2}PO_{4}^{-}]$$

All of these

Solution

Question 3

on increasing dilution

on increasing pressure

on decreasing dilution

none of these

Solution

Question 4

$$0.8\ M\ H_2S +0.8\ M\ KHS$$

$$2\ M\ C_6H_5 NH_2 +2 M\ C_6H_5\ NH_3^+ Br$$

$$3\ M\ H_2CO_3+ 3\ M\ KHCO_3$$

$$0.05\ M\ KClO_4 + 0.05\ M\ HClO_4$$

Solution

Question 5

$$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.1 mol \ dm^{-3}$$ $$HCl$$.

$$0.05 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.1 mol\ dm^{-3}$$ $$HCl$$.

$$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.05 mol\ dm^{-3}$$ $$HCl$$.

$$0.1 mol\ dm^{-3}$$ $$CH_{4}COONa$$ and $$0.1 mol\ dm^{-3}$$ $$NaOH$$.

Solution

Question 6

Basic

Acidic

Neutral

Both (b) and (c)

Solution

Question 7

Concentration of $$SO_2Cl_2(g)$$ increases

Concentration of $$SO_2(g)$$ increases

Concentration of $$Cl_2(g)$$ increases

Concentration of all gases increases

Solution

Question 8

A colloid

A crystalloid

A buffer

A indicator

Solution

Question 9

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Assertion is correct but Reason is incorrect

Both Assertion and Reason are incorrect

If both Assertion and Reason are false.

Solution

Question 10

The pressure inside the container will not change

The temperature will not change

The temperature will increase

The temperature will decrease

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.