Inorganic Compounds, Mohr’s Salt, Potash Alum NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Inorganic Compounds, Mohr’s Salt, Potash Alum MCQ Questions


13.
The shape of potash alum crystals is:
A.
Cubic
B.
Octahedral
C.
Hexagonal
D.
Tetrahedral
😑 View Answer Rough Work Error
ANSWER :
B. Octahedral
14.
When K₃[Fe(CN)₆] is added to Mohr's salt solution, the colour of precipitate is:
A.
Deep blue (Turnbull's blue)
B.
Yellow
C.
White
D.
Reddish brown
😑 View Answer Rough Work Error
ANSWER :
A. Deep blue (Turnbull's blue)
15.
What is the role of NH₄Cl in Group III analysis?
A.
Suppresses ionisation of NH₄OH (common ion effect) so that Group IV cations don't precipitate
B.
Acts as oxidising agent
C.
Provides Cl⁻ for precipitation
D.
Makes solution acidic
😑 View Answer Rough Work Error
ANSWER :
A. Suppresses ionisation of NH₄OH (common ion effect) so that Group IV cations don't precipitate
16.
Hydrogen sulphide is used in qualitative analysis as a:
A.
Catalyst
B.
Drying agent
C.
Group reagent for II and IV cations
D.
Solvent
😑 View Answer Rough Work Error
ANSWER :
C. Group reagent for II and IV cations
17.
Which one is observed when a salt is heated on charcoal cavity, giving yellow incrustation when hot, white when cold?
A.
Cu²⁺
B.
Pb²⁺
C.
Zn²⁺
D.
Mg²⁺
😑 View Answer Rough Work Error
ANSWER :
B. Pb²⁺
18.
When a colourless salt gives a coloured solution in water, the cation is most likely:
A.
K⁺
B.
Mg²⁺
C.
Na⁺
D.
A transition metal ion (e.g., Cu²⁺ blue, Ni²⁺ green, Cr³⁺ green)
😑 View Answer Rough Work Error
ANSWER :
D. A transition metal ion (e.g., Cu²⁺ blue, Ni²⁺ green, Cr³⁺ green)