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

Subtopic:  d-Block Elements- Properties & Uses |
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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 |
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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)

Subtopic:  d-Block Elements- Properties & Uses |
 67%
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In the form of dichromate, Cr (VI) is a strong oxidising agent in acidic medium
but Mo (VI) in MoOand W (VI) in WOare 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.
Choose the correct option

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  d-Block Elements- Properties & Uses |
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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)

Subtopic:  d-Block Elements- Properties & Uses |
 71%
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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)

Subtopic:  d-Block Elements- Properties & Uses |
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Which of the following ions show a higher spin-only magnetic moment value?

a. Ti3+
b. Mn2+
c. Fe2+
d. Co3+

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  d-Block Elements- Properties & Uses |
 77%
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The electronic configuration of gadolinium (atomic number of 64) is:

1. [Xe]4f35d56s2

2. [Xe]4f75d26s1

3. [Xe]4f75d16s2

4. [Xe]4f85d66s2

Subtopic:  d-Block Elements- Properties & Uses |
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Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?

1.  25

2.  26

3.  27

4.  24

Subtopic:  d-Block Elements- Properties & Uses |
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The electronic configuration of Cu(II) is 3d9 whereas that of Cu(I) is 3d10, the correct statement about the aqueous solution of  Cu(II) and Cu(I) among the following is:

1. Cu(II) is more stable
2. Cu(II) is less stable
3. Cu(I) and Cu(II) are equally stable
4. Stability of Cu(I) and Cu(II) depends on the nature of copper salts

Subtopic:  d-Block Elements- Properties & Uses |
 67%
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