Chemical Equilibrium Test

Result

Chemical Equilibrium Test - 61

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
4 / -1

Sodium carbonate cannot be used in place of ammonium carbonate for the identification of the fifth group radicals. This is because the

A
sodium ions will interfere in the detection of the fifth group radicals

B
concentration of carbonate ions is very low

C
sodium will react with acidic radicals

D
magnesium will be precipitated
Question 2
4 / -1

The pH of blood does not appreciably change by a small addition of acid or a base because blood

A
contains serum protein which acts as buffer

B
contains iron as a part of the molecule

C
can be easily coagulated

D
is body fluid
Question 3
4 / -1

The solubility of calcium phosphate in water is x mol L^–1 at 25^o C. Its solubility product is equal to

A
108x²

B
36x³

C
36x⁵

D
108x⁵

Solution
Question 4
4 / -1

The K_sp of CuS, Ag₂S and HgS are 10^–31,10^–44 and 10^–54 respectively The solubility of these sulphides are in the order

A
Ag,sub>2S > CuS > HgS

B
AgS > HgS > CuS

C
HgS >Ag,sub>2S > CuS

D
CuS >Ag₂S >HgS

Solution
Question 5
4 / -1

A physician wishes to prepare a buffer solution at pH = 3.58 that efficiently resists a change in pH yet contain only small conc. of the buffering agents. Which one of the following weak acid together with its sodium salt would be best to use?

A
m - Chloro benzoic acid (pK_a = 3.98)

B
p - Chlorocinnamic acid (pK_a = 4.41)

C
2,5-dihydroxy benzoic acid (pK_a = 2.97)

D
Acetoacetic acid (pK_a =3.58)

Solution
Question 6
4 / -1

A
I₂

B
I^–

C

D
None
Question 7
4 / -1

Which of the following on reaction with H₂S does not produce metallic sulphide?

A
CdCl₂

B
ZnCl₂

C
COCl₂

D
CuCl₂
Question 8
4 / -1

What is the value of K_sp for PbCl₂ ?

A

B

C

D

Solution
Question 9
4 / -1

1 M NaCl and 1 MHCl are present in an aqueous solution. The solution is

A
not a buffer solution with pH < 7

B
not a buffer solution with pH > 7

C
a buffer solution with pH < 7

D
a buffer solution with pH > 7
Question 10
4 / -1

Species acting both as Bronsted acid and base is

A
(HSO₄)^–1

B
Na₂CO₃

C
NH₃

D
OH^–1

Solution