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Chemistry M.C.Q (1 Marks)

Coordination Compounds · Rajasthan Board (RBSE) STD 12 Science (Rajasthan - English Medium). 40 questions.

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M.C.Q (1 Marks)

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40 questions · 3 auto-graded MCQ + 37 self-marked written.

Question 21 Mark
Number of moles of precipitated AgCl on adding excess silver nitrate solution in the solution of one mole of $CoCl _3 .5 NH _3$ is :
Answer
b
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Question 101 Mark
Coordination number of Co in the complex $\left[ Co [ en ]_2\left( NH _3\right)_2\right] Br _3( CN )$ is :
Answer
d
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Question 131 Mark
Which of the following does not exhibit paramagnetic characteristics? (Atomic numbers $Ti =22 ; Fe =26$; $Cr =24 ; Cu =29$ )
Answer
d
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Question 161 Mark
The configuration of a complex of a transition metal is $\left( t _{2 g}\right)^4\left( e _{ g }\right)_2$. The nature of the ligand attached to the metal ion is :
Answer
b
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Question 181 Mark
$\left[ Cr \left( H _2 O \right)_6\right] Cl _3$ has a magnetic moment of $3.83 B, M$. The correct distribution of 3 d electrons in the Cr of the complex is :
Answer
a
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Question 241 Mark
Complexes $\left[ Cr \left( H _2 O \right)_6\right] Cl _3 \quad$ and $\left[ Cr \left( H _2 O \right)_5 Cl \right] Cl _2 \cdot H _2 O$ :
Answer
c
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Question 291 Mark
The complexes $\left[ Co \left( H _2 O \right)_6\right]\left[ CrCl _3\right]$ and $\left[ Cr \left( H _2 O \right)_6\right]\left[ CoCl _6\right]$ are shown :
Answer
b
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Question 341 Mark
What is the isomerism between the complexes $\left[ Co \left( NH _3\right) Br \right] SO _4$ and $\left[ Co \left( NH _3\right)_3 SO _4\right] Br$ ?
Answer
c
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Question 371 Mark
What will be the number of halide ions present in the aqueous solution of the complex $\left[ Pt \left( NH _3\right)_3 Cl { }_2 Br \right] Cl$ ?
Answer
c
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MCQ 381 Mark
Amongst the following, the most stable complex is :
  • A
    $\left[ Fe \left( H _2 O \right)_6\right]^{3+}$
  • B
    $\left[ Fe \left( NH _3\right)_6\right]^{3+}$
  • ✓
    $\left.Fe \left( C _2 O _4\right)_3\right]^{3-}$
  • D
    $\left[ FeCl _6\right]^{3-}$
Answer
Correct option: C.
$\left.Fe \left( C _2 O _4\right)_3\right]^{3-}$
(C) Because it contains $C _2 O _4^{2-}$ (oxalate) ligand which is chelating and this increases stability.
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MCQ 391 Mark
The oxidation number of cobalt in $K \left[ Co \left( CO _4\right)\right]$ is :
  • A
    1
  • B
    3
  • ✓
    -1
  • D
    -3
Answer
Correct option: C.
-1
(C) K[Co(CO)4]
+ 1 + x + 0 = 0
x = -1
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MCQ 401 Mark
How many ions are produced from the complex $Co \left( NH _3\right)_6 Cl _2$ in solution ?
  • A
    6
  • B
    4
  • ✓
    3
  • D
    2
Answer
Correct option: C.
3
(C) Ionization of this complex is as follows, hence three ions will be produced in its solution.
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