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Aerugo, also known as verdigris, is the green "bloom" visible on many

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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 17 Mar 2015, 23:58
Aerugo, also known as verdigris, is the green "bloom" visible on many copper items, and is produced, like iron rust, over the course of time by the exposure of the metal to the oxygen in the atmosphere.

a) visible on many copper items, and is produced

b) that is visible on many copper items, and which produces

c) visible on many copper items, and produces

d) that is visible on many copper items, and that produces

e) which is visible on many copper items, and which is produced
change the intended meaning of the sentence: green "bloom" is not like iron rust, but Aerugo does
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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 16 Jul 2016, 21:17
robinantony wrote:
the correct tense is produced rather than produces.

which is , which is is redundant in E. Will go for A.


Hi Buddy, just a clarification - (and please check me if I am wrong) - when you say produces in the context of B, C and D - I reckon that indicates that the 'green bloom' is what is doing the producing. Whereas, it is the end of a cause (oxidation of metal).... and not the cause of anything (so it can't be the one producing anything)...

Just my $0.2 :)
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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 29 Jul 2016, 23:22
ArvGMAT wrote:
Aerugo, also known as verdigris, is the green "bloom" visible on many copper items, and is produced, like iron rust, over the course of time by the exposure of the metal to the oxygen in the atmosphere.
a) visible on many copper items, and is produced
b) that is visible on many copper items, and which produces
c) visible on many copper items, and produces
d) that is visible on many copper items, and that produces
e) which is visible on many copper items, and which is produced



A

B, D , E change the meaning with "produces"
E seems to wordy with redundant which...
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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 28 Feb 2017, 09:47
I do not completely understand this question. I have learned that if we have " comma and " we have to have a full sentence with a subject and verb.

Is it possible to use the subject from the other part of the sentence ? If so the rule does not make sense does it ? Because then after the "comma and" I just need a verb


This "rule" that we need after a "comma and" a full sentence is from MGMAT SC Guide



Or do I capture the problem wrong... When I think about it, it seems more like a list of things and not as an Independent sentence... Ok then I guess it ok not to have a subject
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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 28 Feb 2017, 14:25
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asdfghjklasdfghj, this is not an iron-clad rule. We do want to avoid gratuitous commas. For instance, it's wrong to write "I like to sing, and dance." However, there are some cases in which the sentence is potentially complicated or confusing enough that a comma is warranted. There are official GMAT SC questions that do this, even in places where I personally would not choose to use a comma. Here's an example: https://gmatclub.com/forum/covering-71- ... 06346.html

For a detailed explanation of the purpose of the comma in the aerugo sentence, check out Michael Schwartz's comments in our forums:
https://www.manhattanprep.com/gmat/foru ... 10863.html
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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 01 Mar 2017, 01:12
DmitryFarber wrote:
asdfghjklasdfghj, this is not an iron-clad rule. We do want to avoid gratuitous commas. For instance, it's wrong to write "I like to sing, and dance." However, there are some cases in which the sentence is potentially complicated or confusing enough that a comma is warranted. There are official GMAT SC questions that do this, even in places where I personally would not choose to use a comma. Here's an example: https://gmatclub.com/forum/covering-71- ... 06346.html

For a detailed explanation of the purpose of the comma in the aerugo sentence, check out Michael Schwartz's comments in our forums:
https://www.manhattanprep.com/gmat/foru ... 10863.html



Sounds great but complicated though... Good to know that in the "normal" case we use "comma and" just for an independent clause. I see now that E changes the meaning and without the comma we would also have a meaning problem. I try to keep that in mind, thanks ! Great help
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Re: Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 24 May 2017, 21:08
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It is produced not produces.

Between A and E .

While A shows a complete meaning . E is incomplete sentence. No verb present for the Main subject.

Hence A is right answer.
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Aerugo, also known as verdigris, is the green "bloom" visible on many [#permalink]

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New post 21 Oct 2017, 06:25
ArvGMAT wrote:
Aerugo, also known as verdigris, is the green "bloom" visible on many copper items, and is produced, like iron rust, over the course of time by the exposure of the metal to the oxygen in the atmosphere.

(A) visible on many copper items, and is produced

(B) that is visible on many copper items, and which produces

(C) visible on many copper items, and produces

(D) that is visible on many copper items, and that produces

(E) which is visible on many copper items, and which is produced


OFFICIAL EXPLANATION


The original sentence correctly uses the passive construction "is produced," which is necessary because of the later construction "by the exposure of the metal to the oxygen in the atmosphere." Changing this verb to the active voice would create an illogical sentence: "Aerugo...produces...by the exposure of the metal to the oxygen in the atmosphere."

(A) CORRECT. This choice is correct as it repeats the original sentence.

(B) "Produces" is incorrectly in the active voice, making "by the exposure of the metal to the oxygen in the atmosphere" illogical. Moreover, "that" and "which" are unnecessary.

(C) "Produces" is incorrectly in the active voice, making "by the exposure of the metal to the oxygen in the atmosphere" illogical.

(D) "Produces" is incorrectly in the active voice, making "by the exposure of the metal to the oxygen in the atmosphere" illogical. Moreover, both instances of "that" are unnecessary.

(E) "Is produced" is correctly in the passive voice. However, both instances of "which" are unnecessary.
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Aerugo, also known as verdigris, is the green "bloom" visible on many   [#permalink] 21 Oct 2017, 06:25

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