The metallic radii of some transition elements are given below. An element that has the highest density is:
Element | Fe | Co | Ni | Cu |
Metallic radii/pm | 126 | 125 | 125 | 128 |
1. Fe
2. Ni
3. Co
4. Cu
A compound that has coloure in solid state is -
1. Ag2SO4
2. CuF2
3. ZnF2
4. Cu2Cl2
On addition of small amount of KMnO4, to concentrated H2SO4, a green oily compound is obtained which is highly explosive in nature. What is the compound ?
The magnetic nature of elements depends on the presence of unpaired electrons. Which of the configuration of transition element will shows highest magnetic moment ?
There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
1. U
2. Np
3. Tm
4. Fm
The electronic configuration of gadolinium (atomic number of 64) is:
1.
2.
3.
4.
The actinoid that can show oxidation states up to +7 is:
1. Am
2. Th
3. U
4. Np
An actinoid that does not have one electron in its 6d orbital is -
1. | U (Atomic number. 92) | 2. | Np (Atomic number. 93) |
3. | Pu (Atomic number. 94) | 4. | Cm (Atomic number. 96) |
Which of the following has the highest spin-only magnetic moment value?
1.
2.
3.
4.
Match Column I (Catalyst) with Column II (Process), and mark the appropriate option:
Column I - (Catalyst) | Column II - (Process) | ||
A. | Ni in the presence of hydrogen | 1. | Contact process |
B. | Cu2Cl2 | 2. | Vegetable oil to ghee |
C. | V2O5 | 3. | Sandmeyer reaction |
D. | Finely divided iron | 4. | Haber's process |
5. | Decomposition of KClO3 |
Codes:
A | B | C | D | |
1. | 3 | 4 | 2 | 5 |
2. | 2 | 3 | 1 | 4 |
3. | 5 | 4 | 3 | 2 |
4. | 4 | 5 | 3 | 2 |