JEE CHEMISTRY UNIT 11
QUIZ NO 2
TOTAL QUESTIONS = 20
1. Which element forms a green complex with EDTA?
A. Iron
B. Nickel
C. Zinc
D. Cobalt
2. Which lanthanide is used in flint lighter alloys?
A. Neodymium
B. Cerium
C. Praseodymium
D. Lanthanum
3. Which of the following shows +7 oxidation state?
A. Tc
B. Cr
C. V
D. Mn
4. Which d-block element is widely used in stainless steel?
A. Nickel
B. Vanadium
C. Chromium
D. Iron
5. Which of the following compounds is used in the detection of carbon monoxide?
A. Co2(CO)8
B. Ni(CO)4
C. Fe(CO)5
D. K4[Fe(CN)6]
6. Which element is used in the manufacture of nichrome?
A. Fe
B. Cr
C. Ni
D. Zn
7. What is the main reason for the variable oxidation states in transition metals?
A. High melting points
B. Incompletely filled d-orbitals
C. High electronegativity
D. Completely filled d-orbitals
8. Which among the following is an actinide?
A. Protactinium
B. Uranium
C. Plutonium
D. Thorium
9. What is the common oxidation state of lanthanides?
A. +1
B. +2
C. +4
D. +3
10. Which of the following elements is known as the coinage metal?
A. Silver
B. Copper
C. Gold
D. Zinc
11. Which element is considered a rare earth metal?
A. Terbium
B. Gadolinium
C. Europium
D. Neodymium
12. What is the spin-only magnetic moment of Fe2+?
A. 4.9 BM
B. 3.87 BM
C. 2.83 BM
D. 5.92 BM
13. What is the role of zinc in the reduction of Fe in the blast furnace?
A. Flux
B. Oxidizing agent
C. Catalyst
D. Reducing agent
14. Why do transition metals exhibit variable oxidation states?
A. Due to similar energy of 3d and 4s orbitals
B. Due to large atomic sizes
C. Due to high electronegativity
D. Due to the presence of paired d-electrons
15. Which lanthanide ion is colorless in aqueous solution?
A. Nd3+
B. Gd3+
C. Ce4+
D. La3+
16. Which element forms a deep blue color with starch-iodine solution?
A. Fe
B. Ni
C. Co
D. Zn
17. Which property of d-block elements decreases across the period?
A. Thermal conductivity
B. Melting point
C. Atomic size
D. Ionization enthalpy
18. Which of the following is a lanthanide?
A. Cerium
B. Promethium
C. Lanthanum
D. Actinium
19. What is the magnetic moment of a d5 system in BM?
A. 5.92
B. 3.87
C. 2.83
D. 4.90
20. What is the coordination number of cobalt in [Co(NH3)6]Cl3?
A. 2
B. 6
C. 4
D. 8
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