Haloalkanes & Haloarenes Flashcards

1
Q

Primary uses of dichloromethane

A
  • Solvent as a paint remover
  • Propellant in aerosols
  • As process solvent in drug manufacture
  • As metal cleaning and finishing solvent
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2
Q

What harm does methylene chloride cause to the humans?

A

It harms the human central nervous system.

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3
Q

Methylene chloride

A

CH2Cl2

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4
Q

Impairments that can be caused by exposure to lower levels of methylene chloride in the air

A

Slightly impaired hearing and vision

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5
Q

Symptoms that are associated with higher levels of methylene chloride in the air

A
  • Dizziness
  • Nausea & tingling
  • Numbness in the fingers and toes
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6
Q

How does direct skin contact with methylene chloride affect humans?

A

It causes intense burning and mild redness of the skin.

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7
Q

Potential impact of methylene chloride coming into contact with the eyes

A

It can burn the cornea.

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8
Q

Primary uses of Chloroform

A
  • Solvent for fats, alkaloids and iodine
  • Production of the freon refrigerant R-22
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9
Q

Chloroform

A

CHCl3

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10
Q

Previous use of chloroform in surgery

A

General anesthesia in surgery

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11
Q

Why has chloroform been replaced as an anesthetic? Name the anesthetic.

A

It has been replaced by less toxic and safer anesthetics, such as ether.

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12
Q

How does inhalation of chloroform vapors affect the central nervous system?

A

It depresses the central nervous system.

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13
Q

What symptoms can occur from breathing a high concentration of chloroform vapors?

A
  • Dizziness
  • Fatigue
  • Headache
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14
Q

What potential organ damage can be caused by chronic chloroform exposure?

A

Damage to the liver and kidneys

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15
Q

In which organ chloroform is metabolized to phosgene?

A

Liver which gets damaged due to chronic chloroform exposure.

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16
Q

What happens when the skin is immersed in chloroform?

A

Some people may develop sores.

17
Q

How does chloroform react with air in the presence of light?

A

It slowly oxidizes to form a highly poisonous gas called carbonyl chloride or phosgene.

18
Q

How should chloroform be stored to prevent its oxidation?

A

It should be stored in closed dark-colored bottles that are completely filled to keep air out.

19
Q

Phosgene

A

COCl2

20
Q

Write the reaction for the formation of phosgene.

A

2CHCl3 + O2 —-> 2COCl2 + 2HCl (carried out in the presence of light)

21
Q

Iodoform

A

CHI3

22
Q

What was the previous use of iodoform?

A

It was used as an antiseptic.

23
Q

What is responsible for the antiseptic properties of iodoform?

A

The liberation of free iodine.