Chemical Equilibrium Test

Result

Chemical Equilibrium Test - 58

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following salt undergoes hydrolysis?

A
KCl

B
K₂SO₄

C
NaNo₃

D
K₂C₂O₄
Question 2
4 / -1

On dissolving a salt in water (pH=7), the pH of the solution was found to be greater than 7. It must be salt of

A
strong acid, weak base

B
weak acid, strong base

C
strong acid, strong base

D
weak acid, weak base
Question 3
4 / -1

For the salt of weak acid and strong base, the hydrolysis constant is given by the expression

A

B

C

D
Question 4
4 / -1

Which of the following relations is correct for degree of hydrolysis of CH₃COONH₄ ?

A

B

C

D

Solution
Question 5
4 / -1

Which one of the following statements is incorrect?

A
In Group II of analysis, the solution is acidified before passing H₂S to decreases S^2- ion conc.

B
In Group IV, the solution is made ammoniacal before passing H₂S to increase S^2-ion concentration

C
Solubility products to sulphides of Group II radicals are higher than those of Group IV radicals

D
Solubility product can be calculated from the concentrations of the ions only if the solution is saturated
Question 6
4 / -1

During the precipitation of third group of qualitative analysis, ammonium chloride is added before adding ammonium hydroxide. The function of NH₄Cl is to

A
increase the ionisation of NH₄OH

B
supress the ionisation of NH₄OH

C
convert the ions of group third into their respective chlorides

D
stabilise the hydroxides of Group III cations
Question 7
4 / -1

At 90⁰ C, pure water has [H₃O⁺] = 10^–6 mol L^–1. What is the value of K_w at 90⁰ C ?

A
10^–6

B
10^–12

C
10^–14

D
10^–8
Question 8
4 / -1

Which of the following salts undergoes anionic hydrolysis?

A
CuSO₄

B
NH₄Cl

C
FeCl₃

D
Na₂CO₃

Solution
Question 9
4 / -1

Which of the following is most soluble?

A

B

C

D
Question 10
4 / -1

The best indicator for the detection of end point in titration of a weak acid and a strong base is

A
Methyl orange (3 to 4)

B
Methyl red (5 to 6)

C
Bromothymol blue (6 t0 7.5)

D
Phenolphthalein (8 to 9.6)