Q. No.The largest oxidation number exhibited by an element depends on its electronic configuration. With which of the following electronic configurations will the element exhibit the largest oxidation number?
1. 3d14s2
2. 3d34s2
3. 3d54s1
4. 3d54s2
Generally transition elements and their salts are coloured due to the presence of unpaired electrons in metal ions. Which of the following compounds are coloured?
a. KMnO4
b. Ce(SO4)2
c. TiCl4
d. Cu2Cl2
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment?
a. Co2+
b. Cr2+
c. Mn2+
d. Cr3+
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
In the form of dichromate, Cr (VI) is a strong oxidising agent in acidic medium but Mo (VI) in MoO3 and W (VI) in WO3 are not because ___________.
| (a) | Cr (VI) is more stable than Mo(VI) and W(VI). |
| (b) | Mo(VI) and W(VI) are more stable than Cr(VI). |
| (c) | Higher oxidation states of heavier members of group-6 of transition series are more stable. |
| (d) | Lower oxidation states of heavier members of group-6 of transition series are more stable. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
General electronic configuration of actionoids is (n–2)f1–14 (n-1)d0–2ns2. Which of the following actinoids have one electron in 6d orbital?
a. U (Atomic no. 92)
b. Np (Atomic no.93)
c. Pu (Atomic no. 94)
d. Am (Atomic no. 95)
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Transition elements form binary compounds with halogens. Which of the following elements will form MF3 type compounds?
| (a) | Cr | (b) | Co |
| (c) | Cu | (d) | Ni |
Choose the correct option
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
Which of the following will not act as oxidizing agents?
a. CrO3
b. MoO3
c. WO3
d. CrO42–
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because ___________.
a. It has variable ionisation enthalpy
b. It has a tendency to attain noble gas configuration
c. It has a tendency to attain f0 configuration
d. It resembles Pb4+
Choose the correct option
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
Which of the following actinoids show oxidation states upto +7?
(a) Am
(b) Pu
(c) U
(d) Np
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)
In the listed lanthanoids, the element that displays a +2 oxidation state along with the characteristic +3 oxidation state of lanthanoids is:
(a) Ce
(b) Eu
(c) Yb
(d) Ho
Choose the correct option
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
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