Analytical Test

Result

Analytical Test - 12

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Weekly Quiz Competition

Question 1
4 / -1

Identify the correct order of solubility of Na₂S, CuS and ZnS in aqueous medium

A
CuS > ZnS > Na₂S

B
ZnS > Na₂S > CuS

C
Na₂S > CuS > ZnS

D
Na₂S > ZnS > CuS
Question 2
4 / -1

In borax bead test which compound is formed ?

A
Orthoborate

B
Metaborate

C
Double oxide

D
Tetraborate

Solution
Question 3
4 / -1

A

B

C

D

Solution
Question 4
4 / -1

A
HgS

B
HgS + Hg₂S

C
HgS + Hg

D
HgS

Solution
Question 5
4 / -1

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

A
By adding excess of NH₄OH solution

B

C
By decreasing OH^- ion concentration

D
Both (2) and (3)

Solution
Question 6
4 / -1

Which one of the following statement is correct ?

A
From a mixed precipitate of AgCl and AgI, ammonia solution dissolves only AgCl

B
Ferric ions give a deep green precipitate on adding potassium ferrocyanide solution

C

D
Manganese salts give a violet borax bead test in the reducing flame
Question 7
4 / -1

A

B

C

D

Solution
Question 8
4 / -1

In a solution containing Cu²⁺and Cd²⁺, dil H₂ SO₄ is added followed by iron fillings. The solution is warmed and NH₄ OH is added to reduce the acidity followed by passing of H₂S gas. The ppt. obtained will be

A
Cu metal

B
CdS

C
Both Cu metal and CdS

D
None of these
Question 9
4 / -1

The complex compounds formed when KCN solution is added to a solution containing both Cu²⁺ and Cd²⁺ ions are

A
K₂[Cu(CN)₄], K[Cd(CN)₄]

B
K₃[Cu(CN)₄], K[Cd(CN)₄]

C
K₃[Cu(CN)₄], K[Cd(CN)₄]

D
K₂[Cu(CN)₄], K[Cd(CN)₄]
Question 10
4 / -1

If phosphate is present as an interfering radical in a mixture but III, IV, V groups and Mg²⁺ are absent, then

A

B

C

D

Solution