Compounds of Transitional Elements MCQs

Compounds of Transitional Elements MCQs

Transition elements and their compounds hold significant importance in chemistry. Iron and its alloys are extensively used as structural materials. Copper is crucial for electrical wiring, silver compounds are utilized in photographic processes, titanium is employed in lightweight alloys and as a pigment in paints, gold has historically been a symbol of value and beauty, and platinum serves as a vital catalyst. Additionally, transition elements play a key role in both chemistry and biological systems. Metals such as iron, copper, cobalt, zinc, and molybdenum are essential for various biological functions. Transition metals, which are d-block elements, possess incompletely filled d-orbitals. These elements are characterized by having a partially filled d or f subshell in the metal atom or one of its oxidation states.

Atomic radii of d-block elements in a series

(a) decreases with increase in atomic number
(b) increases with increase in atomic number
(c) remains constant
(d) none of the above

The 3d transition series contains elements having an atomic number from

(a) 21 to 30
(b) 21 to 31
(c) 22 to 30
(d) 21 to 29

Formation of interstitial compounds makes the transition metals more

(a) soft
(b) ductile
(c) malleable
(d) none of the above

The first transition element is

(a) copper
(b) nickel
(c) scandium
(d) vanadium

Transition metals are complexes act as

(a) Lewis acid
(b) Lewis base
(c) Neutral
(d) none of the above

Paramagnetism is common in

(a) s-block elements
(b) p-block elements
(c) d-block elements
(d) any of them

The density of transition metals in a series

(a) decreases gradually
(b) increases gradually
(c) remains constant
(d) may increase or decrease

In industrial processes, transition elements and their oxides are used as

(a) surfactants
(b) insecticides
(c) catalyst
(d) any of them

Transition elements exhibit variable valency because they release electrons from

(a) ns orbitals
(b) np orbitals
(c) (n-1)d orbitals
(d) (n-1)d & ns orbitals

Transition metals are generally coloured because

(a) they absorb electromagnetic radiations
(b) their penultimate d-subshells are fully filled
(c) of d-d transition
(d) none of the above