coreyander wrote:
A government agency released results showing that the average lead content in many wines sold in the U.S. exceeds the Federal government's standard for drinking water. According to the results, domestically produced wines tested in the bottle often had lead contents lower than the amount allowed for drinking water; however, when the wines were poured, both domestic and imported wines contained lead levels higher than the standard for drinking water. Italian wines were found to contain some of the highest lead levels.
Which of the following, if true, contributes most to an explanation of the increase in the lead levels of domestically produced wines?
A) Pipes soldered with lead are often used in the wine production process.
B) The grapes used to make wine are often exposed to the automobile exhaust produced by leaded gasoline.
C) Leaky corks may allow the wines to react with the lead foil caps commonly used to cover the corks.
D) Deposits from the lead foil caps commonly used to cover corks may accumulate on the lips of the bottles.
E) Domestic wineries often use contaminated ground water in the wine production process.
The Para talks of lower levels of lead when in bottle but higher levels when poured in glass.Which of the following, if true, contributes most to an explanation of the increase in the lead levels of domestically produced wines?
The answer has to be something that defers when in bottle and when in glass.SO what can be the answer-
1) Interaction with atmosphere when being poured.
2) Difference in material of glass and bottle.
3) Some chemical reaction that takes place either in the absence or in the presence of oxygen or atmosphere.
Keeping in mind the logic we have to look for, let us check each choice.Quote:
A) Pipes soldered with lead are often used in the wine production process.
This is a process that is done before wine is bottled, so does not relate to the difference when in bottle and when in glass.
Quote:
B) The grapes used to make wine are often exposed to the automobile exhaust produced by leaded gasoline.
Again, this is a process that is done before wine is bottled, so does not relate to the difference when in bottle and when in glass.
C) Leaky corks may allow the wines to react with the lead foil caps commonly used to cover the corks.
This relates to the time frame when the wine is bottled, so does not give an answer to the increase in lead after it is poured.
Quote:
D) Deposits from the lead foil caps commonly used to cover corks may accumulate on the lips of the bottles.
Yes, now this talks of the extra lead getting added to the wine, while wine is being poured in glass, so an activity that takes place between the time frame 'when in bottle and when in glass'
Quote:
E) Domestic wineries often use contaminated ground water in the wine production process.
Again same as the choices A, B and C. This is a process that is done before wine is bottled, so does not relate to the difference when in bottle and when in glass.
D