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)

Subtopic:  d-Block Elements- Properties & Uses | f-Block Elements- Properties & Uses |
 58%
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General electronic configuration of actionoids is (n–2)f 1–14 (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)

Subtopic:  f-Block Elements- Properties & Uses |
 57%
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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)

Subtopic:  f-Block Elements- Properties & Uses |
 75%
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 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)

Subtopic:  f-Block Elements- Properties & Uses |
 61%
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Which of the following oxidation state is common for all lanthanoids?

1.  +2

2.  +3

3.  +4

4.  +5

Subtopic:  f-Block Elements- Properties & Uses |
 92%
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There are 14 elements in the actinoid series. Which of the following elements does not belong to this series?

1. U

2. Np

3. Tm

4. Fm

Subtopic:  f-Block Elements- Properties & Uses |
 67%
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Match the property given in Column I with the element given in Column II.

              Column I

             ( Property)

               Column II

               (Element)

A. Lanthanoid which shows + 4 oxidation state

1. Pm

B. Radioactive lanthanoid
 

2. Ce

C.  Lanthanoid which has 4f7 electronic configurations in +3 oxidation state

3. Lu

D. Lanthanoid which has 4f14 electronic configurations in +3 oxidation state

4. Gd

Codes

Options:   A    B    C    D  
1. 2 4 1 3
2. 1 2 3 4
3. 2 1 4 3
4. 4 1 3 2

     

Subtopic:  f-Block Elements- Properties & Uses |
 81%
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