Quiz 23

Question 1

1. Biological catalyst which expedite reactions by lowering the amount of activation required.

enzymes

positive catalyst

inhibitor

depressants

Answer 1

enzymes

Question 2

2. In the presence of certain chemical reagents, excessive heat, radiation, unfavorable pH, etc., the protein structure may become disorganized. This is called

rearrangement

denaturation

putrefaction

isomerism

Answer 2

denaturation

Question 3

3. Ethylene readily undergoes the following type of reaction

addition

elimination

substitution

rearrangement

Answer 3

addition

Question 4

4. A functional group on the principal polymer chain.

radical group

pendant group

aromatic group

chain group

Answer 4

radical group

Question 5

5. Ring compounds consisting of carbon and other atoms.

aromatic

heterocyclic

terpolymer

copolymer

Answer 5

aromatic

Question 6

6. Which of the following compound gives a foul odor?

hydrogen sulfide

methane

carbon dioxide

nitrogen

Answer 6

hydrogen sulfide

Question 7

7. Aluminum chloride is found to exist as a

monomer

dimer

trimer

tetramer

Answer 7

dimer

Question 8

8. According to Bronsted - Lowry theory, an acid is a substance that can

accept an electron pair

donate an electron pair

accept a proton

donate a proton

Answer 8

donate a proton

Question 9

9. A gamma-ray source for radiation therapy treatments.

uranium-235

cobalt-60

uranium-236

plutonium-239

Answer 9

cobalt-60

Question 10

10. The Lucas test is used to determine the types of

alcohols

amines

acids

amino acids

Answer 10

alcohols

Question 11

11. A carboxylic acid which contributes to the strong odor of rancid butter and other fats.

caproic acid

acetic acid

lactic acid

butyric acid

Answer 11

butyric acid

Question 12

12. Which one of the following is not a metal?

Al

O

Zn

Hg

Answer 12

O

Question 13

13. Which one of the following is a metalloid?

Al

Ge

Be

Zn

Answer 13

Ge

Question 14

14. Which one of the following is improperly labeled?

K-alkali metal

Ca-alkaline earth metal

Xe-chalcogen

Br-halogen

Answer 14

Xe-chalcogen

Question 15

15. Which one of the following is improperly labeled?

Na-alkali metal

Kr-noble gas

Ba-alkaline earth metal

I-chalcogen

Answer 15

I-chalcogen

Question 16

16. Which of the following statements is incorrect?

saltpeter,KNO3, is really potassium nitrate

soda ash, Na2 CO3, is really sodium carbonite

lime, CaO, is really calcium oxide

muriatic acid, HCl, is really hydrochloric acid

Answer 16

soda ash, Na2 CO3, is really sodium carbonite

Question 17

17. Which one of the following is named correctly?

calcium sulfide, Ca(HS)2

bromic acid , HBrO2

aluminum nitride, AlN

iron(III) oxide, FeO

Answer 17

aluminum nitride, AlN

Question 18

18. Which is incorrectly named, using the rules for binary molecular compounds?

SbCl3-antimony trichloride

C2O5-dicarbon pentoxide

H3As-hydrogen arsenide

NO2 nitrogen dioxide

Answer 18

H3As-hydrogen arsenide

Question 19

19. Balance the following equation and indicate whether it is a combustion, combination, or decomposition reaction : Li + N2  Li3N

6Li + N2 -> 2Li3N, combination reaction

Li + N2 -> 3Li3N, combination

6Li + N2 -> 2Li3N, decomposition reaction

Li + N2 -> 3Li3N , combustion

Answer 19

6Li + N2 -> 2Li3N, combination reaction

Question 20

20. ______ involves electron transfer from one atom to another?

covalent bonding

ionic bonding

hydrogen bonding

metallic bonding

Answer 20

ionic bonding

Question 21

21. Which of the following is responsible for the abnormally high boiling point of water?

covalent bonding

hydrogen bonding

high polarity

large dielectric constant

Answer 21

hydrogen bonding

Question 22

22. sp² hybridization will be found for carbon in

CH4

C2H4

C2H2

CH3OH

Answer 22

C2H4

Question 23

23. . Saponification is a reaction in which a tricylglycerol reacts with a strong base to form

glycerol and three soap molecules

glycerol and three water molecules

three fatty acid molecules and water

oleic acid and water

Answer 23

glycerol and three soap molecules

Question 24

24. The alkane containing a total of 20 hydrogen atoms must be an isomer of

cyclononane

decane

eicosane

nonane

Answer 24

nonane