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)

General electronic configuration of actionoids is (n–2)f ^1–14 (n-1)d^0–2ns².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. CrO₄^2–

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)

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)