1 |
In [Co(NH3)6]+3 the coordination number of cobalt is. |
Zero
Two
Four
Six
|
2 |
Element of which group are called non typical transition elements. |
IB
II B
II A
VII B
|
3 |
d -block elements which show anomalous configuration in first series are |
Cr and Ni
Cr and Cu
Cu and CO
Fe and Ni
|
4 |
The transition elements which are present in 4th period of periodic table have atomic number. |
<div>22 to 30</div>
21 to 30
21 to 29
21 to 31
|
5 |
Which form interstitial compounds. |
Fe
Ni
CO
All of those
|
6 |
The variation pattern in ionic radii of first transition series shows |
A regular increase
A regulars decrease
No regular pattern
A regular decrease and than alight increase
|
7 |
Which one of the following elements commonly exhibits oxidation states of +6 and +3 in aqueous solution. |
Na
Cr
Mg
C
|
8 |
Which one of the following elements has no variable valency. |
Zinc
Iron
cobalt
Manganese
|
9 |
Which one of the following elements shows variable valency, can act as a catalyst and form coloured compounds. |
Carbon
Chlorine
Sulpur
Iron
|
10 |
The total number of translation elements is |
10
14
40
65
|
11 |
The colour of transition metal complexes is due to |
d-d transition of electrons
Paramagnetic nature of transition elements
Ionization
Loss of s -electrons
|
12 |
The percentage of carbon is different types of iron products is in the order of. |
Cast iron > wrought iron > Steel
Wrought iron >Steel >Cast iron
Cast iron > Steel > Wrought iron
Cast iron > Steel > Wrought iron
|
13 |
Group VI B of transition elements contains. |
Zn, Cd, Hg
Fe, Ru,Os
Cr, Mo, W
Mn, Te, Re
|
14 |
f - block elements are also called. |
Non typical transition elements
Outer transition elements
Inner transition elements
None of true
|
15 |
Which of the following is a typical transition metal. |
Sc
Y
Ra
CO
|
16 |
Which of the following is a non typical transition element. |
Cr
Mn
Zn
Fe
|
17 |
The percentage of carbon in different types of iron products is in the order of |
cast iron > wrought iron > steel
wrought iron > steel > cast iron
cast iron > steel > wrought iron
cast iron = steel > wrought iron
|