Transition metals - MCQ

 MCQ - Transition metal

1. 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

Answer: (a)

2. The first transition element is

a. copper

b. nickel

c. scandium

d. vanadium

Answer: (c)

3. Transition metals are generally coloured because

a . they absorb electromagnetic radiations

b. their penultimate d-subshells are fully filled

    of d-d transition

c. d-d transition

d . p- p transition

Answer: (c)

4. 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

Answer: (a)

5. Formation of interstitial compounds makes the transition metals more

a. soft

b. ductile

c . malleable

d. none of the above

Answer: (d)

6. Paramagnetism is common in

a. s-block elements

b. p-block elements

c. d-block elements

d. None of them

Answer: (c)

7. Transition metals are complexes act as

a. Lewis acid

b. Lewis base

c. Neutral

d. none of the above

Answer: (a)

8. 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

Answer: (c)

9. The density of transition metals in a series

a. decreases gradually

b. increases gradually

c. remains constant

d. may increase or decrease

Answer: (b)

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

a. surfactants

b. insecticides

c. catalyst

d. None  of them

Answer: (c)

11. The correct electronic configuration of Cr is

a.  [Ar]4s23d4

b. [Ar] 4s23d4

c. [Ar]4s03d5

d. [Ar]4s13d5

Answer: (d)