January 2018 Chemistry Regents #21-25

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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
 

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21 Which process involves the transfer of electrons?

(1) double replacement

(2) neutralization

(3) oxidation-reduction

(4) sublimation

3 REDOX--electrons transfer

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

4 An OX...LEO

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

1 electrolytic cell   ....requires a power source

 

24 Which substance is an Arrhenius acid?

(1) HBr                  (3) NaOH

(2) NaBr               (4) NH3

1 H in front

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

4 titration....acid base lab

 

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
 

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