ModelQuestionAnswerCh21

ModelQuestionAnswerCh21 - Model Question Chapter 21 1) What...

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Model Question Chapter 21 1) What is the oxidation number of potassium in KMnO 4 ? A) 0 B) +1 C) +2 D) -1 E) +3 2) What is the oxidation number of bromine in the BrO 3 - ion? A) -1 B) +1 C) +3 D) +5 E) +7 3) What is the oxidation number of nitrogen in the HNO 3 ? A) -1 B) +1 C) +3 D) +5 E) +7 4) What is the oxidation number of chromium in Cr 2 O 7 2- ion? A) +3 B) +6 C) +7 D) +12 E) +14 5) Which substance is serving as the reducing agent in the following reaction? 14H + + Cr 2 O 7 2- + 3Ni 3Ni 2+ + 2Cr 3+ + 7H 2 O A) H + B) Cr 2 O 7 2- C) Ni D) H 2 O E) Ni 2+ 6) Which element is oxidized in the reaction below? I - + MnO 4 - + H + I 2 + MnO 2 + H 2 O A) I B) Mn C) O D) H
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7) In a voltaic cell, electrons flow from the __________ to the __________. A) salt bride, anode B) anode, salt bridge C) cathode, anode D) salt bridge, cathode E) anode, cathode 8) Which of the following statements are true? A) A reduction is due to loss of electrons B) A reducing agent that loses electrons is oxidized C) A reduction is due to a gain of electrons D) A and C E) B and C 9) The standard cell potential (E° cell ) for the voltaic cell based on the reaction below is __________ V. Sn
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ModelQuestionAnswerCh21 - Model Question Chapter 21 1) What...

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