Originally developed for detecting air pollutants, a : GMAT Sentence Correction (SC)
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# Originally developed for detecting air pollutants, a

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VP
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Originally developed for detecting air pollutants, a [#permalink]

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02 Feb 2007, 23:07
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Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,

Missed this one in a 20/20 challenge. Please discuss.
If you have any questions
New!
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Re: SC 1000 - X-ray emission [#permalink]

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03 Feb 2007, 01:44
B is out sinnce it has two modifier at the beginning...
C, D and E have modifer problem...modifer modifying 'technique' should be kept close to it...

A is the only option having correctly placed modifer...I am not sure about the use of 'which' here...
Director
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Re: SC 1000 - X-ray emission [#permalink]

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03 Feb 2007, 03:29
kripalkavi wrote:
Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,

Missed this one in a 20/20 challenge. Please discuss.

Agree with A. The use of which is correct here since it is following a comma and includes somewhat non-essential information. The sentence would still be right if stated without the which part.
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Re: SC 1000 - X-ray emission [#permalink]

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03 Feb 2007, 04:04
hsampath wrote:
kripalkavi wrote:
Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,

Missed this one in a 20/20 challenge. Please discuss.

Agree with A. The use of which is correct here since it is following a comma and includes somewhat non-essential information. The sentence would still be right if stated without the which part.

My ans is C,provided the usage of "which" is justified.My disgreement with "A" is it does not provide properly the subject for the verb "is finding"
Please corect if i m wrong.
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03 Feb 2007, 04:07
A

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,
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03 Feb 2007, 05:04
AK wrote:
A

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,

Hai AK,
I find bit difficult. cud u explain why "c" is wrong?
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03 Feb 2007, 06:55
Between A & B, B has modifier problem. So, keeping A.

Between C & D, â€˜has the abilityâ€™ in D is excessive. So, keeping C.

Between C & E, â€˜ A technique that was..â€™ â€˜that wasâ€™ is excessive in E.

Now left with A & C.

I prefer â€˜a technique called prton-â€¦â€™ in A as in â€˜Câ€™ technique and its name have some distance.

A.
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03 Feb 2007, 14:23
B is wrong because has too many consecutive modifiers... confusing

C & D are wrong because the clause between comas "called proton-induced x-ray emission" seems to refer to "air pollutants". Reference for "which" is also ambiguous

E is wrong because of the final misplacement of the protoninduced clause.

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Re: SC 1000 - X-ray emission [#permalink]

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03 Feb 2007, 15:57
kripalkavi wrote:
Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,

C - has correct modifiers and "which" correctly refers to the proton induced xray emission.

A-has two modifiers at the beginning it's not clear what they are modifying, nor what "which" is referring to.
B-wordy, and "having the ability to" is bad
D-which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
"quickly" should immediately precede analyze""
"can" is preferred to "has the ability to"
E modifying phrases need to be set off by commas
VP
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04 Feb 2007, 19:19
AK wrote:
A

(A) Originally developed for detecting air pollutants, a technique called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton induced x-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced x-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced x-ray emission,

Ah! There we go...thank you! The OA is A
04 Feb 2007, 19:19
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