January 2014 Chemistry Regents #21-30

Highlight to reveal answers and explanations

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

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Questions

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Explanations

21 Which formula represents an organic compound?

( l) CaH2      (3) H2O2

(2) C4H8      (4) P2O5

2 Link look for carbon

22 Which class of organic compounds contains nitrogen?

(I) aldehyde

(2) alcohol

(3) amine

(4) ether

3 Link look at Reference Table R

23 Which term identifies a type of organic reaction?

(1) deposition    (3) esterification

(2) distillation     (4) sublimation

3 Link acid + alcohol==> ester + water

 

24 Which compound is classified as a hydrocarbon?

(1) butanal (3) 2-butanol

(2) butyne (4) 2-butanone

2 Link hydrocarbon= hydrogen and carbon only

Table Q

25 In an oxidation-reduction reaction, the number of electrons lost is

(1) equal to the number of electrons gained

(2) equal to the number of protons gained

(3) less than the number of electrons gained

(4) less than the number or protons gained

1 Link Law of Conservation of Charge

26 Which substance is an electrolyte?

(1) C6H12O6(s)       (3) NaOH(s)

(2) C2H5OH(L)     (4)  H2(g)

3 Link NaOH= strong base

electrolytes= acid, base or salts

(must be soluble)

 

27 Which energy conversion must occur in an operating electrolytic cell?

(1) electrical energy to chemical energy

(2) electrical energy to nuclear energy

(3) chemical energy to electrical energy

(4) chemical energy to nuclear energy

1 Link electrolytic cells require a power source for a reaction to occur

28 Which compound yields H + ions as the only positive ions in an aqueous solution?

(1) KOH    (3) CH3OH

(2) NaOH  (4) CH3COOH

4 Link definition of an acid

Table K

 

29 Which statement describes the relative masses of two different particles?

(1) A neutron has less mass than a positron.

(2) A beta particle has less than a neutron.

(3) An alpha particle has less mass than a positron.

(4) An alpha particle has less mass than a beta particle.

2 Link beta is an electron (1/1836u) vs. a neutron (1u)

 

Table O

30 Which term represents a type of nuclear reaction?

(1) condensation

(2) vaporization

(3) single replacement

(4) natural transmutation

4 Link aka natural nuclear decay

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

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