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Questions and Answers
What is the characteristic of arsenic in its metal form?
What is the characteristic of arsenic in its metal form?
- It is a sulphide compound
- It is soluble in water
- It is insoluble in water (correct)
- It is tasteless
Which of the following compounds of arsenic is tasteless?
Which of the following compounds of arsenic is tasteless?
- Arsenious oxide (correct)
- Arsenates of Pb
- Sulphides of Arsenic
- Copper arsenite
Which compounds of arsenic are sulphides?
Which compounds of arsenic are sulphides?
- As2S3 and As2S2 (correct)
- Copper arsenite and copper acetoarsenite
- Arsenious oxide and arsenates of Pb
- Arsenates of Pb and arsenites of Na & K
What is the term used to describe arsenic?
What is the term used to describe arsenic?
Which of the following compounds of arsenic are copper compounds?
Which of the following compounds of arsenic are copper compounds?
What is the smallest dose of arsenic that can cause death?
What is the smallest dose of arsenic that can cause death?
What is the time period for the fatal effects of arsenic in its narcotic form?
What is the time period for the fatal effects of arsenic in its narcotic form?
How is the patient treated after arsenic poisoning?
How is the patient treated after arsenic poisoning?
What is the antidote used to treat arsenic poisoning?
What is the antidote used to treat arsenic poisoning?
What is the duration of administration of the antidote in water?
What is the duration of administration of the antidote in water?
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Study Notes
Arsenic
- Metal arsenic is non-poisonous and insoluble in water (H2O)
Forms of Arsenic
- Arsenious oxide (As2O3): tasteless, very poisonous
- Sulphides of Arsenic: As2S3, As2S2
Compounds of Arsenic
- Copper compounds: Copper arsenite, Copper acetoarsenite
- Other compounds: Arsenate of Pb, arsenites of Na & K
Arsenic Poisoning
- Fatal dose of arsenic: 120-200 mg
- Minimum lethal dose: 100 mg
- Time frame for fatality:
- 2-3 hours when ingested in narcotic form
- 12-24 hours when ingested in gastrointestinal (GI) form
Treatment for Arsenic Poisoning
- Immediate removal of patient from further exposure
- Stomach lavage with warm water (repeated washing)
- Administration of an antidote: freshly prepared FeCl3 (ferric chloride)
- Antidote reaction: forms ferric arsenite (a harmless salt)
- Dosage: 1 tablespoon of antidote in water for 2-3 days
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