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Questions 51-54
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Questions

Explanations

21 Which process involves the transfer of electrons?

(1) double replacement

(2) neutralization

(3) oxidation-reduction

(4) sublimation

22 Which change occurs at the anode in an operating electrochemical cell?

(1) gain of protons           (3) loss of protons

(2) gain of electrons        (4) loss of electrons

lose electrons oxidation

23 Which device requires electrical energy to produce a chemical change?

(1) electrolytic cell           (3) voltaic cell

(2) salt bridge                    (4) voltmeter

24 Which substance is an Arrhenius acid?

(1) HBr                  (3) NaOH

(2) NaBr               (4) NH₃

25 Which laboratory process is used to determine the concentration of one solution by using a volume of another solution of known concentration?

(1) crystallization              (3) filtration

(2) distillation                    (4) titration

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85