| 1 |
A transition metal complex can be recognized by various terms. Which is not the proper term
|
A. Central metal ion
B. Coordination number
C. Ligand
D. Geometry of complex
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| 2 |
The oxidation number of Ni in [Ni(CO)4] is
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A. +1
B. 0
C. +4
D. -4
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| 3 |
d-block elements closely resemble in their physical and chemical properties. Which statement is incorrect
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A. They show variable valency
B. Their ions and compounds are coloured
C. They are good conductors of heat and electricity
D. Their compounds are diamagnetic
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| 4 |
All 3d series elements show variable oxidation states. The one shown by all 3d elements is
|
A. +2
B. +3
C. +4
D. +5
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| 5 |
The number of unpaired electrons in Fe3+(Z = 26) are
|
A. 5
B. 6
C. 3
D. 4
|
| 6 |
[Ti(H2O)6]+3ion absorbs colour:
|
A. Blue
B. Yellow
C. Green
D. Red
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| 7 |
CuSO4. 5H2O is used to prepare
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A. Transition complex
B. Fehling's 'A' sol
C. Fehling's 'B' sol
D. Fehling's sol
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| 8 |
Which of the following is a carbonate are?
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A. Pyrolusite
B. Malchite
C. Diaspore
D. cassiterite
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| 9 |
Which alloy contains 50% copper, 25% zinc and 25% nickel
|
A. German silver
B. Gun metal
C. Bell metal
D. Brass
|
| 10 |
The percentage of carbon in different types of iron products is in the order of:
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A. Cast iron > wrought iron > steel
B. wrought iron > steel > cast rion
C. Cast iron > steel > wrought iron
D. Cast iron = steel > wrought iron
|
| 11 |
4-d series is in the period:
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A. 4th
B. 5th
C. 6th
D. 7th
|
| 12 |
The compound which gives oxygen on moderate heating is
|
A. Zinc oxide
B. Mercuric oxide
C. Aluminium oxide
D. Ferric oxide
|
| 13 |
d-block elements are also called :
|
A. alkali metal
B. Alkaline earth metals
C. Transition elements
D. Electron deficient elements
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| 14 |
Misch mental is
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A. An alloy of Aluminium
B. A mixture of chromium and lead chromate
C. An alloy of lanthanoid metals
D. An alloy of copper
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| 15 |
What is the shape of Fe(CO)5molecule?
|
A. Tetrahedral
B. Octahedral
C. Trigonal bipyramidal
D. Square pyramidal
|
| 16 |
Titanium is used as a catalyst in
|
A. Hydrogenation
B. Dehydrogenation
C. Polymerization of P.E.
D. Oxidation of ammonia
|
| 17 |
During oxidation in k2Cr2O7, Cr VI changes to :
|
A. I
B. II
C. III
D. IV
|
| 18 |
Coordination sphere may be:
|
A. Cationic
B. Anionic
C. Neutral
D. All above
|
| 19 |
Rusting can be avoided by :
|
A. Making alloys
B. Tin or Zinc plating
C. Use of enamel
D. All of these
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| 20 |
Among the lanthandes the one obtained by synthetic method is
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A. Lu
B. Pm
C. Pr
D. Gd
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| 21 |
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
|
| 22 |
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
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| 23 |
Which of the following d-block elements can show the highest oxidation number in its compounds
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A. Chromium
B. Copper
C. Nickel
D. Manganese
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| 24 |
In physical and chemical properties, transition elements show
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A. Similarities
B. Dissimilarities
C. Both of these
D. Somestimes similarities, sometimes dissimilarities
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| 25 |
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
|
| 26 |
Which has the largest radius?
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A. CO3+
B. Mn3+
C. Fe3+
D. Cr3+
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| 27 |
What are alloys
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A. A homogenous mixture of two or more elements
B. A homohenous mixture of metal and a non-metal
C. A homogenous mixture of two or more metals
D. None of the above
|
| 28 |
Which is the formula of tetra-ammine chloro-nitro platinum (IV) sulphate
|
A. [Pt(NH3)4(NO2)] SO4
B. [Pt NO2CI(NH3)4] SO4
C. [Pt CI(NO2) (NH3)4] SO4
D. [Pt (NH3)4(NO2) CI] SO4
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| 29 |
Which of the following acts as ligand
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A. NH3
B. NH2-- CH2-- CH2-- NH2
C. C2O2-4
D. All these
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| 30 |
Transition elements form which type of bond
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A. Ionic bonds only
B. Covalent bonds only
C. Ionic and covalent bonds
D. Polar bonds
|