12th class (Fsc) Chemistry unit 6 MCQs
chapter 6 MCQs 12th Class Chemistry
Transition Elements:
1. Which of the following is a non-typical transition element?
a. Zn
b. Cr
c. Fe
d. Mn
2. Which of the following is a typical transition metal?
a. Ra
b. Se
c. Co
d. Y
3. f-block elements are also called:
a. normal transition elements
b. non-typical transition elements
c. outer transition elements
d. None is true
4. The strength of binding energy of transition elements depends upon:
a. Number of neutrons
b. Number of electrons pairs
c. Number of protons
d. Number of unpaired electrons
5. Group VIB of transition elements contain:
a. Cr,Mo,W
b. Zn,Cd,Hg
c. Mn,Te,Re
d. Fe,Ru,Os
6. Which is the formula of tetraammine chloro-nitro-platinum (IV) sulphate?
a. [Pt(NH3)4(NO2)Cl]SO4
b. [PtCl(NH3)4(NO2)]SO4
c. [PtCl2(NH3)4(NO2)]SO4
d. [Pt(NH3)4(NO2)Cl2]SO4
7. The percentage of carbon in different types of iron products is in the order of:
a. Cast iron> steel> wrought iron
b. Cast iron > wrought rion> steel
c. cast iron = steel> wrought iron
d. Wrought iron>steel iron> cast iron
8. The color of transition metal complexes is due to:
a. Ionization
b. d-d transition of electrons
c. Loss of s- electros
d. Paramagnetic nature of transition elements
9. Coordination number of Pt in[PtCl(NO2)(N3)4] is:
a. 1
b. 2-
c. 6
d. 4
10. Total number of d-block elements are:
a. 30
b. 10
c. 40
d. 20
11. The total number of transition elements is:
a. 40
b. 10
c. 58
d. 14
12. The elements of which two blocks are collectively called transition element?
a. Normal elements
b. D-block and f-block
c. P-block and d-block
d. None is true
13. How many transition series are present in modern periodic table?
a. One
b. Two
c. Four
d. Three
14. First transition series is present in:
a. 3rd period
b. 2nd period
c. 5th period
d. 4th period
15. The first transition series started with:
a. La
b. Sc
c. Ac
d. Y
16. Which two of the following subgroups are referred to as nontypical transition elements?
a. IV-B,V-B
b. III-B,VI-B
c. I-B,II-B
d. II-B,III-B
17. The coinage metals have complettely filled d-subshell but still they are included in transition elements because;
a. They are heavy metal
b. They show variable valency
c. Both a and b
d. None of these
18. The geometry of [MnCI4]-2 is:
a. Trigonal dipyramidal
b. Square planer
c. Octahedral
d. Tetrahedral
19. The involvement of which sub-energy level’s electron in bonding responsible of +2 oxidation state in all 3rd series elements?
a. D
b. P
c. F
d. S
20. Which orbit of transition elements are responsible for thedevelopment of colors in their compounds?
a. D-orbitals
b. S-orbitals
c. F-orbitals
d. P-orbitals
21. What is the formula of magnetite?
a. Fe2O3 .3H2O
b. Fe2O3
c. Cu2O
d. Fe3O4
22. What is the formula of haematite?
a. Fe2O3 .3H2O
b. Fe2O3
c. Cu2O
d. Fe3O4
23. What is the formula of limonite?
a. Fe2O3 .3H2O
b. Fe2O3
c. Fe3O4
d. None of these
24. What is the pig iron?
a. Alloy iron
b. Cast iron
c. Wrought iron
d. None of these
25. Pig iron contains:
a. 0.25-2.5% C
b. 2.5-4.5% C
c. 0.12-0.25% C
d. None of these