Which of the following statements are correct about the molecule pictures above?

Question

Which of the following statements are correct about the molecule pictures above?

a. It is called 1.4-dichlorobenzene

b. It is a byproduct of a herbicide

c. It is an organic molecule

d. It has very low solubility in water

Which of the following statements are correct about the entity pictured above?

a. It is an organic molecule

b. It is an anion

c. It is a cation

d. It helps to create a buffer solution in natural waters

e. It is part of the carbon cycle

3.) What are the common themes in all combustion reactions in air using organic molecules as reactants?

a. breaking of bonds in an oxygen atmosphere

b. formation of oxygen molecules

c. production of CO and CO2 gases

d. formation of water

e. formation of nitrogen oxides

4.) Match the analytical technique most appropriate to determine the content in the following samples.

[] Mercury versus lead

[]nitrates versus sulfates

[] N- hexane versus 2- methyl pentane

[] benzane versus n- hexane

1. Atomic absorption spectroscopy

2. Gas chromatography

3. Ion chromatography

Explanation / Answer

correct answers

1)  

c. It is an organic molecule

d. It has very low solubility in water

2)

b. It is an anion

d. It helps to create a buffer solution in natural waters

e. It is part of the carbon cycle

3)

a. breaking of bonds in an oxygen atmosphere

c. production of CO and CO2 gases

d. formation of water

4)

Mercury versus lead ----------------> Atomic absorption spectroscopy

Gas chromatography ---------------> N- hexane versus 2- methyl pentane

nitrates versus sulfates--------------> Ion chromatography

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