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Home
Analytical Test - 4
Analytical Test - 4
Result
Analytical Test - 4
/
Score
-
Rank
Time Taken:
-
Question
1/10
4 / -1
In the analysis of basic radicals, NH
4
OH and NH
4
Cl give precipitate with
Correct
Wrong
Skipped
A
I-group radicals
Correct
Wrong
Skipped
B
II-group radicals
Correct
Wrong
Skipped
C
III-group radicals
Correct
Wrong
Skipped
D
IV-group radicals
Question
2/10
4 / -1
Out of Cu
2+
, Ni
2+
, CO
2+
and Mn
2+
, which is dissolved when H
2
S is passed through it in the presence of dil. HCl ?
Correct
Wrong
Skipped
A
Cu
2+
Correct
Wrong
Skipped
B
Ni
2+
Correct
Wrong
Skipped
C
CO
2+
Correct
Wrong
Skipped
D
Mn
2+
Question
3/10
4 / -1
The only cations present in a slightly acidic solution are Fe
3+
, Zn
2+
and Cu
2+
. The reagent that when added in excess to this solution would identify and separate Fe
3+
in one step is
Correct
Wrong
Skipped
A
2M HCl
Correct
Wrong
Skipped
B
6M NH
3
Correct
Wrong
Skipped
C
6M NaOH
Correct
Wrong
Skipped
D
H
2
S gas
Question
4/10
4 / -1
The dark blue colour of the solution formed when excess of ammonia is added to a solution of copper (II) sulphate is due to the presence of the ion
Correct
Wrong
Skipped
A
[Cu(OH)
4
(H
2
O)
2
]
2-
Correct
Wrong
Skipped
B
[Cu(H
2
O)
6
]
2+
Correct
Wrong
Skipped
C
[Cu(NH
4
)
2
(H
2
O)
4
]
4+
Correct
Wrong
Skipped
D
[Cu(NH
3
)
4
(H
2
O)
2
]
2+
Solutions
Question
5/10
4 / -1
A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is
Correct
Wrong
Skipped
A
Pb
2+
Correct
Wrong
Skipped
B
Hg
2+
Correct
Wrong
Skipped
C
Cu
2+
Correct
Wrong
Skipped
D
CO
2+
Question
6/10
4 / -1
Prussian blue is obtained by mixing together aqueous solution of Fe
3+
salt with
Correct
Wrong
Skipped
A
ferricyanide
Correct
Wrong
Skipped
B
ferrocyanide
Correct
Wrong
Skipped
C
hydrogen cyanide
Correct
Wrong
Skipped
D
sodium cyanide
Question
7/10
4 / -1
A solution when diluted with H
2
O and boiled, it gives a white precipitate. On addition of excess NH
4
Cl/NH
4
OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in NH
4
OH/NH
4
Cl.
Correct
Wrong
Skipped
A
Zn(OH)
2
Correct
Wrong
Skipped
B
Al(OH)
3
Correct
Wrong
Skipped
C
Mg(OH)
2
Correct
Wrong
Skipped
D
Ca(OH)
2
Question
8/10
4 / -1
CuSO
4
decolourises on addition of KCN, the product is
Correct
Wrong
Skipped
A
[Cu(CN)
4
]
2-
Correct
Wrong
Skipped
B
Cu
2+
get reduced to form [Cu(CN)
4
]
3-
Correct
Wrong
Skipped
C
Cu(CN)
2
Correct
Wrong
Skipped
D
CuCN
Question
9/10
4 / -1
Copper sulphate solution, when added to an excess of ammonium hydroxide, forms a complex compound due to
Correct
Wrong
Skipped
A
[Cu(NH
3
)
2
]
2+
Correct
Wrong
Skipped
B
[Cu(NH
3
)
4
]
2+
Correct
Wrong
Skipped
C
[Cu(NH
3
)
6
]
2+
Correct
Wrong
Skipped
D
Cu
2+
Question
10/10
4 / -1
A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI convert into orange colour solution. The cation of metal nitrate is
Correct
Wrong
Skipped
A
Hg
2+
Correct
Wrong
Skipped
B
Bi
3+
Correct
Wrong
Skipped
C
Pb
2+
Correct
Wrong
Skipped
D
Cu
+
Re-attempt
-
Correct (
-
)
Wrong (
-
)
Skipped (
-
)
1
2
3
4
5
6
7
8
9
10
Re-attempt
-
Correct (
-
)
Wrong (
-
)
Skipped (
-
)
1
2
3
4
5
6
7
8
9
10
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