12th Board Exam Chemistry Most VVI Objective Question d Block & f Block Elements Chapter
8. ‘d’ BLOCK AND ‘f’ BLOCK ELEMENTS
1. Copper is a member of:
(A) First transition series
(B) Second transition series
(C) Third transition series
(D) Fourth transition series
| Answer :- (A) |
2. Oxidation number of gold metal is :
(A) +1
(B) 0
(C) -1
(D) all of these
| Answer :- (A) |
3. Shape of d-orbital is :
(A) spherical
(B) dumb-bell
(C) double dumb-bell
(D) none of these
| Answer :- (C) |
4. Electronic configuration of alkaline earth element is :
(A) ns2
(B) ns1
(C) np6
(D) ns0
| Answer :- (A) |
5. Outermost configuration 3d64s2k is of :
(A) Ca
(B) Zn
(C) Mg
(D) Fe
| Answer :- (D) |
6. Which one of the following is called green vitriol ?
(A) FeSO4.7H2O
(B) CuSO4.5H2O
(C) CaSO4.2H2O
(D) None of these
| Answer :- (A) |
7. Which block of elements are known as transition elements ?
(A) p-block
(B) s-block
(C) d-block
(D) f-block
| Answer :- (C) |
8. Most abundant element in earth’s crust is :
(A) Si
(B) Al
(C) Zn
(D) Fe
| Answer :- (A) |
9. Which one of the following is diamagnetic ion ?
(A) Co2+
(B) Ni2+
(C) Cu2+
(D) Zn2+
| Answer :- (D) |
10. Which of the following is not an element of first transition series?
(A) Iron
(B) Chromium
(C) Magnesium
(D) Nickel
| Answer :- (C) |
11. Which of the following is not an amphoteric ion ?
(A) A13+
(B) Cr3+
(C) Fe2+
(D) Zn2+
| Answer :- (C) |
12. When Iron powder is added in CuSO4 solution, the blue colour of solution turns :
(A) Black
(B) Green
(C) Brown
(D) Colourless
| Answer :- (C) |
13. Transition elements are also known as:
(A) s-block elements:
(B) p-block elements
(C) d-block elements
(D) p-block elements
| Answer :- (C) |
14. The highest magnetic moment shown by the transition metal ion with the outermost electronic configuration is :
(A) 3d5
(B) 3d2
(C) 3d7
(D) 3d9
| Answer :- (A) |
15. Transitior elements are
(A) Metals
(B) None metals
(C) d-block elements
(D) Gas
| Answer :- (C) |
16. Which of the following elements is liquid at room temperature:
(A) Zn
(B) Hg
(C) Cu
(D) Au
| Answer :- (B) |
17. Which of the following is known as red lead ?
(A) Pb3O4
(B) Pb2O3
(C) PbO
(D) PbO2
| Answer :- (A) |
18. Which of the following is not a member of first transition elements series ?
(A) Cr
(B) Fe
(C) Mg
(D) He
| Answer :- (C) |
19. Which of the following has the most stable +2 oxidation state?
(A) Sn
(B) Ag
(C) Fe
(D) Pb
| Answer :- (D) |
20. Which metal nitrate gives colorless gas on thermal decomposition
(A) NaNO3
(B) Cu(NO3)2
(C) Ba(NO3)2
(D) Hg(NO3)2
| Answer :- (D) |
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