Chem1b-E4-Prac

Chem1b-E4-Prac - Chapter 22 The Chemistry of the Transition...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
216 Chapter 22 The Chemistry of the Transition Elements 1. Which of the following groups of metals occur in nature as the free elements? a) Na, K, Rb b) Mg, Ca, Ba c) Fe, Co, Ni d) Cu, Ag, Au e) Zn, Cd, Hg Answer: d 2. Which of the following transition metal compounds is used as white paint pigment? a) Mn 3 (PO 4 ) 2 b) TiO 2 c) Fe 2 O 3 d) Co 2 O 3 e) CdS Answer: b 3. Which transition metal has the highest melting point? a) W b) Hg c) Fe d) Pt e) Cu Answer: a 4. What is the electron configuration of Cr? a) [Ar]3 d 6 b) [Ar]3 d 5 4 s 1 c) [Ar]3 d 4 4 s 2 d) [Ar]4 s 24 p 4 e) [Ar]4 s 1 4 p 5 Answer: b 5. What is the identity of the element with the ground state electron configuration [Kr]4 d 7 5 s 2 ? a) Tc b) Ru c) Rh d) Pd e) Ag Answer: c 6. What is the maximum oxidation state for manganese? a) 0 b) +1 c) +3 d) +5 e) +7 Answer: e 7. All of the following first transition series elements form compounds with +4 oxidation states EXCEPT a) scandium. b) titanium. c) vanadium. d) chromium. e) manganese. Answer: a 8. All of the following elements from the first transition series react with hydrochloric acid EXCEPT a) scandium. b) titanium. c) iron. d) copper. e) zinc. Answer: d
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
217 9. Given the following standard reduction potentials, Fe 3+ (aq) + e - Fe 2+ (aq) E ° = +0.771 V Fe (aq) + 2 e - Fe(s) E ° = -0.44 V 2 H + (aq) + 2 e - H 2 (g) E ° = 0.000 V predict which one of the following reactions will occur. a) Fe (aq) + H 2 (g) Fe(s) + 2 H + (aq) b) 2 Fe (aq) + 6 H + (aq) 2 Fe(s) + 3 H 2 (g) c) Fe (aq) + 2 H + (aq) Fe (aq) + H 2 (g) d) Fe(s) + 2 H + (aq) Fe (aq) + H 2 (g) e) 2 Fe(s) + 6 H + (aq) Fe (aq) + 3 H 2 (g) Answer: d 10. If an element can be obtained profitably from a mineral, the mineral is called a(n) ________. a) ore b) gangue c) slag d) roast e) precipitate Answer: a 11. What element or compound is used to reduce Fe 2 O 3 to Fe in a blast furnace? a) H 2 b) H 2 O c) CO d) CO 2 e) CaO Answer: c 12. Copper ores are enriched to increase the percentage of copper by a process called ________. a) gangue b) roasting c) pyrometallurgy d) tempering e) flotation Answer: e 13. All of the properties listed below are characteristic of transition element compounds EXCEPT a) many of them are paramagnetic. b) many of them are colored. c) most of the metals exhibit multiple oxidation states. d) most of the metals upon ionizing lose the d electrons first. e) most of the elements form many complexes. Answer: d 14. Ions such as [Ni(H 2 O) 6 ] and [Ag(NH 3 ) 2 ] + are called a) ligands. b) coordination complexes. c) chelates. d) polydentates. e) Lewis bases. Answer: b
Background image of page 2
218 15. All of the following molecules or ions are ligands EXCEPT a) H 2 O. b) NH 4 + . c) Cl - . d) CO. e) CN - . Answer: b 16. All of the following molecules or ions are chelating agents EXCEPT a) acetate ion (CH 3 CO 2 - ). b) ethylenediaminetetraacetate ion (EDTA 4- ). c) oxalate ion (C 2 O 4 2- ). d) ethylenediamine (en). e) phenanthroline (phen). Answer: a 17. What is the coordination number of K 3 [CoCl 6 ]? a) 1 b) 3 c) 6 d) 9 e) 10 Answer: c 18. What is the oxidation state of the iron in K 4 [Fe(CN) 6 ]?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/27/2010 for the course CHEM 337 taught by Professor Kim during the Fall '10 term at CSU Sacramento.

Page1 / 17

Chem1b-E4-Prac - Chapter 22 The Chemistry of the Transition...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online