Chemistry Chapter 12 Entry Test MCQs
Topic 12
Properties of Transition elements
1. Which of the Following Blocks Refers to the Element with 29 Atomic Numbers?
a. s-block
b. p-block.
c. d-block.
d. f-block.
2. Which statement is true about the transitional elements
a. They show variable oxidation states
b. They are highly reactive
c. They are highly electropositive
d. They have low M.P.
3. The transitional metal which form stable compound in +3 oxidation state and yellow orange compound in highest +6 oxidation state is:
a. Cr
b. Fe
c. Co
d. Ni
4. Highest (+7) oxidation state is shown by:
a. V
b. Co
c. Mn
d. Cr
5. Transitional elements are
a. All solids
b. All metals
c. All highly reactive
d. Metals and non-metals
6. Which of the following has highest ionic radii?
a. Fe+3
b. Cr+3
c. Co+3
d. Mn+3
7. In a reaction the ferrous (Fe++) iron is oxidized to ferric (Fe+++) ion. Which property will remain constant?
a. Atomic weight
b. Half life
c. Unpaired electrons
d. Oxidation state
8. Which is heaviest among the following
a. Gold
b. Iron
c. Silver
d. Copper
9. Transitional elements exhibit variable valencies because they release electrons from the following orbits:
a. (n – 1)d and ns orbits
b. ns orbit
c. (n – 1)d orbit
d. ns and np orbits
10. The tendency towards complex formation is maximum in:
a. d – block elements
b. s – block elements
c. f – block elements
d. s – block elements
11. Which forms coloured salts
a. Transitional elements
b. p – block elements
c. Metals
d. Non-metals
12. Variable valency is shown by:
a. Mg
b. Na
c. Al
d. Cu
13. Most stable oxidation state of iron is
a. -2
b. +2
c. -3
d. +3
14. The element with an atomic number 26 is:
a. Krypton
b. A non-metal
c. Manganese
d. Iron
15. The coinage metals are
a. Copper, Silver and Gold
b. Iron, Cobalt, Nickel
c. Gold and Platinum
d. Copper and Zinc
16. Which of the following structure is that of a coinage metal?
a. 2, 8, 8
b. 2, 8, 1
c. 2, 18, 8, 3
d. 2, 8, 18, 1
17. An elements in +3 oxidation state has the electronic configuration (Ar)3d3. Its atomic number is
a. 22
b. 24
c. 21
d. 23
18. The catalytic activity of the transition metals and their compounds is ascribed to them
a. Magnetic behaviour
b. Chemical reactivity
c. Unfilled d-orbitals
d. Ability to adopt multiple oxidation states and their complexing ability
19. What is the general electronic configuration for 2nd row transition series?
a. [Kr]4d1-10, 5s1-2
b. [Ne]3d1-10, 4s2
c. [Xe]5d1-10, 5s1-2
d. [Ar]3d1-10, 4s1-2
20. Transitional elements are named transition elements because their characters are:
a. Like that of p and d – block elements
b. In between s and p – block elements
c. They are like inactive elements
d. They are members of I – A group
21. Those elements whose two outermost orbitals are incompletely filled with electrons are
a. Transitional elements
b. p – block elements
c. Both s and p – block
d. block elements
22. Which ion has maximum magnetic moment:
a. Fe+3
b. V+3
c. Cu+2
d. Mn+3
23. Which of the following statements is not true in regard to transition elements?
a. They show variable vlency
b. They readily form complex compounds
c. Their ions contain partially filled d-electron levels
d. All their ions are colourless
24. Which of the following represents the electronic configuration of a transition element?
a. 1s2, 2s2 p6 …… ns2p6 d3, (n+1)s2
b. 1s2, 2s2 p6 …… ns2p3
c. 1s2, 2s2 p6 …… ns2p6
d. 1s2, 2s2 p6 …… ns2p6 d10, (n+1)s2p1
25. The general electronic configuration of transition elements is
a. (n – 1)d1-10 ns1-2
b. (n – 1)d1-5
c. ns2(n – 1)d10
d. (n – 1)d1-10 ns-1