1.In which case would exposure to a compound cause you more concern? (Choose one
ID: 921408 • Letter: 1
Question
1.In which case would exposure to a compound cause you more concern? (Choose one from each pair; ie. a or b, c or d, etc.)
a)an LD50 of 2500 mg/kg or b) an LD50 of 50 mg/kg
c) a TLV of 500 ppm or d) a TLV of 5 ppm
e) spilling 0.1 M HCl on my hand or f) spilling 0.1 M HF on my hand
g) 1000 ppm of a chemical asphyxiant or h) 1000 ppm of a simple asphyxiant
2.Identify any statements that are not true.
a)Gasoline in contact with KMnO4 is a fire hazard.
b)Chlorine is a flammable gas.
c)Ammonia should not be stored next to paint thinner because they can undergo an exothermic oxidation reduction reaction.
d)Metal fulminates are subject to explosions, particularly in the solid state.
e)PETN is more closely related to nitroglycerin than TNT.
f)TATP contains –ONO bonds.
g)VX is an organophosphate
h)A carbon dioxide fire extinguisher should not be used on a fire involving burning magnesium.
i)Triethylamine should be labeled as dangerous when wet.
j)An LD50 of 2500 mg/kg represents a bigger threat than an LD50 of 500 mg/kg.
k)Atropine is an appropriate treatment for exposure to HT.
l)VX is a bigger inhalation threat on warm days than cold.
3.Anhydrous ammonia gas has a TLV of 25 ppm, an STEL of 35 ppm, and an IDLH of 500 ppm. It causes serious blistering of the skin within minutes and pulmonary edema when inhaled. The LC50 in mice (inhalation) is 4200 ppm (1 hr). Violent reactions can occur with many inorganic chlorine compounds including chlorites, hypochlorites, and silver chloride which forms a shock sensitive silver nitride. It has an LEL of 16% in air. Use this information to justify your answers to the following:
a)Is ammonia an acute or chronic toxin?
b)What are the main routes of exposure?
c)Should ammonia be labeled as a flammable gas according to DOT?
d)Is ammonia an oxidizer?
4.Which of the following would you expect to react violently or vigorously with air?
a)ClCH2CH2-S-CH2CH2Cl
c)MgO
d)Zirconium powder
5.Give an example (chemical formula) for the element in the following oxidation states:
a)Cl in a +3
b)N in a +1
c)N in a +4
d)P in a +5
e)S in a -2
Explanation / Answer
1). Following exposure to a compound will cause you more concern:
(a). an LD50 of 2500 mg/kg (Since, A waste is considered hazardous waste by oral toxicity if the oral LD50 is less than 2500 mg/kg.)
(c). a TLV of 500 ppm (Since, TLV limits set by the American Conference of Governmental Industrial Hygienists (ACGIH) is 20 ppm)
(e). spilling 0.1 M HCl on my hand (Since, HCl is a stronger acid and HF is a weak acid)
(g) 1000 ppm of a chemical asphyxiant (Since, Simple asphyxiants merely displace oxygen from ambient air whereas chemical asphyxiants react in the human body to interrupt either the delivery or utilization of oxygen)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.