Chemical Equilibrium Test

Result

Chemical Equilibrium Test - 62

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Weekly Quiz Competition

Question 1
4 / -1

How do we differentiate between Fe³⁺ and Cr³⁺ in group III ?

A
by taking excess of NH₄OH

B

C
by decreasing OH⁻ ion concentration

D
both (b) and (c)
Question 2
4 / -1

In which of the following acid-base titration,pH is greater than 8 at the equivalence point?

A
Acetic acid versus ammonia

B
Acetic acid versus sodium hydroxide

C
Hydrochloric acid versus ammonia

D
Hydrocholric acid versus sodium hydroxide
Question 3
4 / -1

Which one of the following statements is not true?

A
pH + pOH = 14 for all aqueous solutions

B
The pH of 10^-8 M HCl is 8

C
96,500 coulombs of electricity when passed through a CuSO₄ solution deposites 1 gram equivalent of copper at the cathode

D
Question 4
4 / -1

When rain is accompanied by a thunderstorm, the collected rain water will have pH value

A
slightly higher than that when the thunderstorm is not there

B
uninfluenced by occurrence of thunderstorm

C
which depends on the amount of dust in air

D
slightly lower than that of rain water without thunderstorm
Question 5
4 / -1

A solution which is 10^-3 M each in Mn²⁺,Fe²⁺,Zn²⁺ and Hg²⁺ is treated with 10^-16 M sulphide ion. If K_sp of MnS, FeS, ZnS and HgS are 10^-15, 10^-23, 10^-20, and 10^-54 respectively, which one will precipitate first ?

A
FeS

B
MgS

C
HgS

D
ZnS
Question 6
4 / -1

The hydrogen ion concentration of 0.2 N CH₃COOH which is 40% dissociated is

A
0.08N

B
0.12N

C
0.80N

D
1.2N

Solution
Question 7
4 / -1

The gastric juice in our stomach contains enough HCl to make the hydrogen ion concentration about 0.01 mole/litre.The pH of gastric juice is

A
0.01

B
1

C
2

D
14

Solution
Question 8
4 / -1

The pH of 10 M HCl aqueous solution is

A
less than 0

B
zero

C
2

D
1
Question 9
4 / -1

When the pH of a solution is 2, the hydrogen ion concentration in moles per litre is

A
1× 10^–14

B
1× 10^–2

C
1× 10^–7

D
1× 10^–12

Solution
Question 10
4 / -1

What is the OH− concentration of an aqueous solution of a substance whose pH= 3.2 ?

A
10^–3.8

B
10^–3.2

C
10^–10.8

D
10^–10.2

Solution