| 1 |
The oxidation number of Ni in [Ni(CO)4] is
|
A. +1
B. 0
C. +4
D. -4
|
| 2 |
IIB elements (Zn, Cd, Hg) and III B elements (Sc, Y and La) are
|
A. Non typical transition element
B. Typical transition element
C. Normal elements
D. Inner transition element
|
| 3 |
What is wrong about transition metals?
|
A. Diamagnetic
B. Paramagnetic
C. Form complexes
D. Shows variable oxidation state
|
| 4 |
Misch mental is
|
A. An alloy of Aluminium
B. A mixture of chromium and lead chromate
C. An alloy of lanthanoid metals
D. An alloy of copper
|
| 5 |
The number of unpaired electrons in Mn2+is
|
A. 5
B. 4
C. 3
D. 2
|
| 6 |
The Mn3+has ______ color
|
A. Violet
B. Green
C. Red/brown
D. No color
|
| 7 |
The free spaces between the metal atoms and its crystal lattice are called
|
A. Valance spaces
B. Empty spaces
C. Interstices
D. None
|
| 8 |
Transition elements are called so because:
|
A. Form interstital sompounds
B. have high m.p
C. In between 's' and' 'p' block elements
D. All of these
|
| 9 |
Steel may be manufacture by two processes which two are correct
|
A. Open hearth process and besemer process
B. Open hearth process and Haber process
C. Bassemer process and Haber process
D. Contact process and Haber process
|
| 10 |
E.D.T.A is
|
A. Mono-dentate
B. Bi-dentate
C. Polydentate
D. Having three lone pairs of electrons
|
| 11 |
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
|
| 12 |
Fe+3and Mn2+are strong paramagnetic because the number of unpaired electrons in each is
|
A. 4
B. 5
C. 6
D. 7
|
| 13 |
Which metal is used for catalytic hydrogenation of oils
|
A. Cu
B. Pt
C. Ni
D. Pd
|
| 14 |
Coordination number of Pt in [PtCl (NO2) (NH3)4]2-
|
A. 2-
B. 4
C. 1
D. 6
|
| 15 |
In the manufacture of iron from haematitie,limestone is added to act as
|
A. Flux
B. A reducing agent
C. Slag
D. An oxidizing agent
|
| 16 |
A transition element is defined as an element of 3d series
|
A. Which is metal
B. Which has one stable ion
C. Which has two stable ions
D. Which has at least one stable ion with incomplete d-orbital
|
| 17 |
The equivalent weight of KMnO4(formula weight = M) when it is used as an oxidant in neutral medium is
|
A. M
B. M/2
C. M/3
D. M/5
|
| 18 |
Which of the following is not correct about transition metals?
|
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
|
| 19 |
In the extraction of iron, slag is produced which is
|
A. CO
B. FeSiO3
C. MgSiO3
D. CaSiO3
|
| 20 |
All 3d series elements show variable oxidation states. The one shown by all 3d elements is
|
A. +2
B. +3
C. +4
D. +5
|
| 21 |
Most transition elements show
|
A. Diamagnetic behavior
B. Ferromagnetic behavior
C. Paramagnetic behavior
D. None of these
|
| 22 |
The iron obtained from blast furnace is
|
A. Pig iron
B. Wrought ion
C. Soft ion
D. Steel
|
| 23 |
Iron, once dipped in concentrated H2SO4, does not displace copper from copper sulphates solution, because
|
A. It less reactive than copper
B. A layer of sulphates is deposited on it
C. An inert layer of iron oxide is deposited on it
D. All valence electrons of iron are consumed
|
| 24 |
In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is
|
A. 3
B. 2
C. 5
D. Zero
|
| 25 |
Which of the following has the maximum number of unpaired d-electrons?
|
A. Zn
B. Fe2+
C. Ni3+
D. Cu+
|
| 26 |
The percentage of carbon in different types of iron products is in the order of
|
A. Cast iron > wrought iron > steel
B. Wrought iron > steel > cast iron
C. Cast iron > steel > wrought iron
D. Cast iron = steel > wrought iron
|
| 27 |
Bell metal is an alloy of Sn and
|
A. Copper
B. Iron
C. Zinc
D. Magnesium
|
| 28 |
[Cu[NH3)4]+2will form ______ structure
|
A. Square planar
B. Tetrahedral
C. Octahedral
D. Trigonal bipyramidal
|
| 29 |
Cu2+with d9electronic configuration appears
|
A. Yellow
B. Pink
C. Blue
D. Green
|
| 30 |
Which is used to identify Cu2+ions
|
A. Nitric acid
B. Sulfuric acid
C. NaOH
D. HCI
|