33. Hydrogen peroxide is an example of an oxidizing agent type of disinfectant. A. Aldehyde B. Halogen C. Heavy metal D. Oxidizing agent E. Surfactant 36. This kind of disinfectant can dissolve cell membranes: A. Aldehydes B. Cephalosporins C. Heavy metals D. Oxidizing agents E. Surfactants 37. Which of the following is an example of a halogen disinfectant? A. Benzalkonium B. Bleach C. Hydrogen peroxide D. Methicillin E. Vesphene 38. Imagine a person has never been exposed to Varicellovirus before, and has never been vaccinated for it. What disease might they get if they are exposed to it? A. Chickenpox B. Genital herpes C. Measles D. Polio E. Shingles 41. Which of the following nucleic acids must be made during the replication cycle of ALL viruses? A. +ssDNA B. +ssRNA C. -ssRNA D. dsDNA E. dsRNA
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How does hydrogen peroxide bleach hair? A. The H2O2 molecules break the double bonds in pigment molecules. B. Melanin changes H2O2 molecules to double bonds C. The H2O2 molecules add hydrogen to melanin D. The H2O2 molecules add hydrogen and oxygen to melanin What advantage does hydrogen peroxide have over other bleaching agents such as chlorine gas? A. Hydrogen peroxide decomposes into nontoxic water and oxygen. B. Hydrogen peroxide decomposes into nontoxic water and hydrogen C. Hydrogen peroxide decomposes into nontoxic double bonds. D. Hydrogen peroxide decomposes into nontoxic water only. How does hydrogen peroxide play a role in air pollution? A. Peroxide fragments react with unburned fuel creating eye irritants. B. Hydrogen fragments react with unburned fuel creating eye irritants. C. Oxygen fragments react with unburned fuel creating eye irritants. D. Water fragments react with unburned fuel creating eye irritants. In the reaction between melanin and hydrogen peroxide, which substance is oxidized (receives electrons)? Which substance is reduced (loses electrons)? A. melanin is oxidized,hydrogen peroxide is reduced B. hydrogen peroxide is oxidized, melanin is reduced C. hydrogen peroxide and melanin are oxidized D. hydrogen peroxide and melanin are reduced
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Hydrogen peroxide is used as a cleansing agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes on contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic microorganisms); and it foams on contact with blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxide can be prepared by the action of an acid on an alkaline earth metal peroxide, such as barium peroxide: $$ \mathrm{BaO}_{2}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{H}_{2} \mathrm{O}_{2}(a q)+\mathrm{BaCl}_{2}(a q) $$ What mass of hydrogen peroxide should result when 1.50 $\mathrm{g}$ barium peroxide is treated with 88.0 $\mathrm{mL}$ hydrochloric acid solution containing 0.0272 $\mathrm{g} \mathrm{HCl}$ per mL? What mass of which reagent is left unreacted?
Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes upon contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic microorganisms); and it foams upon contact with blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxide can be prepared by the action of an acid on an alkaline earth metal peroxide, such as barium peroxide: $$ \mathrm{BaO}_{2}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{H}_{2} \mathrm{O}_{2}(a q)+\mathrm{BaCl}_{2}(a q) $$ What mass of hydrogen peroxide should result when $1.50 \mathrm{~g}$ of barium peroxide is treated with $25.0 \mathrm{~mL}$ of hydrochloric acid soIution containing $0.0272 \mathrm{~g}$ of $\mathrm{HCl}$ per $\mathrm{mL}$ ? What mass of which reagent is left unreacted?
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