| 1 |
[Co(NH3)6]3+will form ______ structure
|
A. Square planar
B. Tetrahedral
C. Octahedral
D. Trigonal bipyamidal
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| 2 |
Which of the following is not correct about transition metals?
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A. Their melting and boiling points are high
B. Their compounds are generally coloured
C. They can form ionic or covalent compounds
D. They do not exhibit variable valency
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| 3 |
The protection of steel by chrome plating is due to
|
A. Cathodic protection
B. Anodic protection
C. Covering of steel surface
D. Formation of alloy with iron
|
| 4 |
The colour of transition metal complexes is due to:
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A. d-d transitions of electorns
B. Paramagnetic nature of transition
C. Ionization
D. Loss of s-electrons
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| 5 |
Choose the correct answer of transition elements?
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A. Transition elements have low melting points
B. Transition elements do not have catalytic activity
C. Transition elements exhibit variable oxidation states
D. Transition elements exhibit inert pair effect
|
| 6 |
Bronze is an alloy which contains
|
A. 60% cu
B. 70% cu
C. 80% cu
D. 99% cu
|
| 7 |
Which of the following is non-typical transition element?
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A. Cr
B. Mn
C. Zn
D. Fe
|
| 8 |
Interstitial compounds have
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A. Half formula
B. Fixed formula
C. Indefinite formula
D. None
|
| 9 |
The total number of rare earth elements is
|
A. 8
B. 32
C. 14
D. 10
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| 10 |
Potassium hexacyanoferrate (II) has the formula
|
A. K4[Fe(CN)6]
B. K3[Fe(CN)6]
C. K2[Fe(CN)6]
D. K [Fe(CN)6]
|
| 11 |
The colour of transition metal complexes is due to
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A. d-d transitions of electrons
B. Para magnetic nature of transition elements
C. Ionization
D. Loss of s-electrons
|
| 12 |
Coordination number of Pt in [PtCI(NO2) (NH3)4]2+is
|
A. 2-
B. 4
C. 1
D. 6
|
| 13 |
Which element belong to 5d series
|
A. V
B. Nb
C. Pd
D. Hf
|
| 14 |
Which one of the following metal ions is colourless?
|
A. V2+
B. Cr3+
C. Zn2+
D. Ti3+
|
| 15 |
4-d series is in the period:
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A. 4th
B. 5th
C. 6th
D. 7th
|
| 16 |
3-d series elements are present in:
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A. First period
B. Second Period
C. Third period
D. 4th period
|
| 17 |
Transition elements differ from s and p block elements due to their characteristic properties. What is not he characteristic property of transition elements
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A. Transition elements show variable oxidation states
B. Their salts are coloured
C. They can be used as catalyst
D. All of them are metals
|
| 18 |
Group VI-B of transition elements contains:
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A. Zn, Cd, Hg
B. Fe ,Ru ,Os
C. Cr, Mo ,W
D. Mn, Te, Re
|
| 19 |
Fe+3and Mn2+are strong paramagnetic because the number of unpaired electrons in each is
|
A. 4
B. 5
C. 6
D. 7
|
| 20 |
Across the lanthanide series, the basicity of the lanthanide hydroxides
|
A. Increases
B. Decreases
C. First increases and then decreases
D. First decreases and then increases
|
| 21 |
Which element does not belong to 3d transition series
|
A. Ti
B. V
C. Mn
D. Te
|
| 22 |
Electronic configuration of Cu+2is
|
A. 4S2, 3d9
B. 4s-1, 3d10
C. 4S0, 3d9
D. None of these
|
| 23 |
Platinum (IV) chloride combines with ammonia to form compounds in which the coordination number of the platinum is 6. A formula unit on one of the compound contains a cation and only two chloride ions. What is the formula of this compound
|
A. Pt(NH3)6CI4
B. Pt(NH3)5CI4
C. Pt(NH3)4CI4
D. Pt(NH3)3CI4
|
| 24 |
E.D.T.A is
|
A. Mono-dentate
B. Bi-dentate
C. Polydentate
D. Having three lone pairs of electrons
|
| 25 |
d-block elements are also called :
|
A. alkali metal
B. Alkaline earth metals
C. Transition elements
D. Electron deficient elements
|
| 26 |
Which of the following has the maximum number of unpaired d-electrons?
|
A. Zn
B. Fe2+
C. Ni3+
D. Cu+
|
| 27 |
Which is the formula of tetra-ammine chloronitro platinum (VI) sulphate?
|
A. [Pt(NH3)4(NO2)]SO4
B. [PtNO2Cl(NH3)4]SO4
C. [PtCl(NO2)(NH3)4]SO4
D. [Pt(NH3)4(NO2)Cl]SO4
|
| 28 |
Non-formation of menisus by Hg in presence of O3is due to the formation of
|
A. Mercuric oxide
B. Mercurous oxide
C. Mercuric chloride
D. Mercurous chloride
|
| 29 |
Group VIB of transition elements contains
|
A. Zn, Cd, Hg
B. Fe, Ru, Os
C. Cr, Mo, W
D. Mn, Te, Re
|
| 30 |
The colour of the transition metal compounds is due to
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A. p-d transition
B. d-d transition
C. s-p transition
D. None of these
|