Explore topic-wise MCQs in The d and f Block Elements.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your The d and f Block Elements knowledge and support exam preparation. Choose a topic below to get started.

1.

The correct IUPAC name of the following compound is |Cr(NH3)5(NCS)||ZnCl4|
A. Penta amine isothiocyanato chromium (III) tetrachlorozincate (II)
B. Penta amine isothicocyanatezinc chloridechromate (III)
C. Penta amine isothicoyanato chromate (II)
D. isothiocyanatopenta amine chromium (II) zinc chloride (IV)
Answer» B. Penta amine isothicocyanatezinc chloridechromate (III)
Discussion
2.

Acidified potassium dichromate reacts with potassium iodide and oxidises it to I2. What is the oxidation state of chromium in the products of the reaction?
A. +4
B. +6
C. +3
D. +2
Answer» D. +2
Discussion
3.

Zr and Hf have almost equal atomic and ionic radii because of
A. diagonal relationship
B. lartthanoid contraction
C. actinoid contraction
D. belonging to the same group
Answer» C. actinoid contraction
Discussion
4.

What happens when potassium iodide reacts with acidic solution of potassium dichromate?
A. It liberates iodine
B. Potassium sulphate is formed
C. Chromium sulphate is formed
D. All the above products are formed
Answer» E.
Discussion
5.

The number of moles of KMnO4 that are needed to react completely with one mole of ferrous oxalate in acidic solution is
A. 3/5
B. 2/5
C. 4/5
D. 1
Answer» B. 2/5
Discussion
6.

The melting points of Cu, Ag and Au follow the order
A. Cu > Ag > Au
B. Cu >Au > Ag
C. Au > Ag > Cu
D. Ag > Au > Cu
Answer» C. Au > Ag > Cu
Discussion
7.

The melting point of copper is higher than that of zinc because
A. copper has a bcc structure
B. the atomic volume of copper is higher
C. the electrons of copper are involved in metallic bonding
D. the s as well as d electrons of copper are involved in metallic bonding
Answer» D. the s as well as d electrons of copper are involved in metallic bonding
Discussion
8.

Colour of transition metal ions are due to absorption of some wavelength. This results in
A. d-s transition
B. s-s transition
C. s-t/transition
D. d-d transition
Answer» E.
Discussion
9.

Most abundant element in earth s crust is
A. Si
B. Al
C. Zn
D. Fe
Answer» B. Al
Discussion
10.

Electronic configuration of alkaline earth element is
A. ns2
B. ns1
C. np6
D. ns0
Answer» B. ns1
Discussion
11.

Shape of d-orbital is
A. spherical
B. dumb bell
C. double dumb bell
D. none of these
Answer» D. none of these
Discussion
12.

Lanthanoid contraction is due to increase in
A. atomic number
B. effective nuclear charge
C. atomic radius
D. valence electrons
Answer» C. atomic radius
Discussion
13.

Which one of the following is called green vitriol?
A. FeSO4 7H2O
B. CuSO4 5H2O
C. CaSO4 2H2O
D. None of these
Answer» B. CuSO4 5H2O
Discussion
14.

Oxidation number of gold metal is
A. +1
B. -1
C. all of these
Answer» B. -1
Discussion
15.

Which block of elements are known as transition elements?
A. p-block
B. s-block
C. d-block
D. f-block
Answer» D. f-block
Discussion
16.

Which of the following is not an element of first transition series?
A. Iron
B. Chromium
C. Magnesium
D. Nickel
Answer» D. Nickel
Discussion
17.

Which one of the following is diamagnetic ion?
A. Co2+
B. Ni2+
C. Cu2+
D. Zn2+
Answer» E.
Discussion