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 ___________.

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?

Choose the correct option

Which of the following will not act as oxidizing agents?

a. CrO₃

b. MoO₃

c. WO₃

d. CrO₄^2–

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

Which of the following ions show a higher spin-only magnetic moment value?

$\mathrm{a}. {\mathrm{Ti}}^{3+}$
$\mathrm{b}. {\mathrm{Mn}}^{2+}$
$\mathrm{c}. {\mathrm{Fe}}^{2+}$
$\mathrm{d}. {\mathrm{Co}}^{3+}$

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

The electronic configuration of gadolinium (atomic number of 64) is:

1. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{3}5{\mathrm{d}}^{5}6{\mathrm{s}}^2$

2. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{7}5{\mathrm{d}}^{2}6{\mathrm{s}}^1$

3. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{7}5{\mathrm{d}}^{1}6{\mathrm{s}}^2$

4. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{8}5{\mathrm{d}}^{6}6{\mathrm{s}}^2$

Electronic configuration of a transition element X in +3 oxidation state is [Ar]$3d^5$. What is its atomic number?

The electronic configuration of Cu(II) is $3d^9$ whereas that of Cu(I) is $3d^{10}$, the correct statement about the aqueous solution of  Cu(II) and Cu(I) among the following is: