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Proton-induced x-ray emission

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Proton-induced x-ray emission

by umaa » Mon Dec 01, 2008 6:46 pm
Originally developed for detecting air pollutions, 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 archeology, criminology and medicine.

A.
B. Originally developed for detecting air pollutions, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called photon-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 quickly and without destroying the substance, called proton-induced x-ray emission,
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Confused!

by rockmyway » Mon Dec 01, 2008 8:28 pm
It seems to me that all answers are incorrect :lol: Please let me know which is the right answer... Thanks!

A: incorrect because the technique has been introduced to detect air "pollutants" not air pollutions.

B: eliminated for the same reason as A

C: incorrectly refers to the air pollutants as "proton-induced x-ray emission"

D: same as C

E: incorrect because the sentence implies that the technique has the ability to analyze, which is incorrect. Also, incorrect sentence formation.
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by rockmyway » Mon Dec 01, 2008 8:29 pm
I think A would be correct if it were to use "pollutants" instead of "pollutions".
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by vivek.kapoor83 » Mon Dec 01, 2008 8:33 pm
IMO C...
A - it has no ref.
B- Akward const
D - has the ability is wrong
E - wrong cost
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Re: Proton-induced x-ray emission

by sudhir3127 » Mon Dec 01, 2008 8:54 pm
umaa wrote:Originally developed for detecting air pollutions, 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 archeology, criminology and medicine.

A.
B. Originally developed for detecting air pollutions, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called photon-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 quickly and without destroying the substance, called proton-induced x-ray emission,
I go with C
the most important thing to notice here is NON - UNDERLINED Part.
the underlined part should modify this . which rules out A B and E

left with C D

D is wordy awkward " which has the ability" and "substance quickly and without destroying it"

thus its C
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by nervesofsteel » Mon Dec 01, 2008 11:29 pm
IMO C

A. Incorrect

B. Originally developed for detecting air pollutions, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called photon-induced x-ray emission, <- incorrect modifiers usage

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, < - Correct IMO

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,< wordy

E. A technique that was originally developed for detecting air pollutants and has the ability to analyze quickly and without destroying the substance, called proton-induced x-ray emission, <- Incorrect modifier usage..
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Re: Proton-induced x-ray emission

by karmayogi » Tue Dec 02, 2008 6:12 am
umaa wrote:Originally developed for detecting air pollutions, 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 archeology, criminology and medicine.

A.
B. Originally developed for detecting air pollutions, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called photon-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 quickly and without destroying the substance, called proton-induced x-ray emission,
To me all are wrong.
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by jnellaz » Tue Dec 02, 2008 12:34 pm
Just to clarify, "air pollutions" is not incorrect! It is commonly used. Such as the sentence:

Regional Air Pollutions in Three Different Regions of Asia From a Transcontinental Transport Perspective
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by VodkaBoy » Tue Dec 02, 2008 3:03 pm
IMO every option has some flaws, but if I had to choose the least flawed, I'd choose A, since it is the most appropriate choise.

The whole mess here is about the modifiers.

A) Although I think that "can quickly analyze the chemical elements in almost any substance without destroying it" is a restrictive clause, which usually preceeded by "that", the use of "which" is also not forbidden. The use of "pollutions", is not so bad to me (however, "pollutants" would be better).
At least all modifiers here are at their places, and the whole sentence is consice <- The best choice.
B) "having the ability to analyze" - awkward. In GMAT I haven't encountered so far the option with "having the ability", that would be the correct answer.
C) Mess with modifiers. The subj. and the verb are separated with two long modifying phrases, making so called "weak subject". That's why the reader may assume that "pollutants are called proton-induced x-ray emission" and "emission can quickly analyze something"
D) and E) have the same flaws.

Best regards!
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by umaa » Tue Dec 02, 2008 5:21 pm
The answer is A.

B. Awkward
C. "Called proton-induced x-ray emission" is wrong and misplaced. It should come with a comma
D same as C
E. Awkward
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Re: Proton-induced x-ray emission

by bsandhyav » Wed Dec 03, 2008 12:33 am
umaa wrote:Originally developed for detecting air pollutions, 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 archeology, criminology and medicine.

A.
B. Originally developed for detecting air pollutions, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called photon-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 quickly and without destroying the substance, called proton-induced x-ray emission,



Guyz i had eliminated option A 'coz of the ambiguous usage of 'it'. But looks like it is not ambiguously used here. Can some one plz explain to me whether 'it' refers to chemical elements or substance here. (I understand that if the subject would have been chemical elements then 'it' should have been 'them'...this is the reason why i eliminated the option A)

Is there any rule which says 'it' always modifies the noun immediately preceeding it?
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by umaa » Wed Dec 03, 2008 7:22 am
bsandhyav,
Here "it" refers "substance" not the "chemical elements"

Hope this helps,
Umaa
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by bsandhyav » Wed Dec 03, 2008 10:55 am
yeah umaaa.....i also did realise that after re-reading the sentence. Just wanted to know the reason behind it.....and if any rule is linked to it
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by NSNguyen » Sat Dec 06, 2008 7:40 am
IMO: A
Please share your idea and your reasoning :D
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Re: Proton-induced x-ray emission

by karmayogi » Sat Dec 06, 2008 9:02 am
karmayogi wrote:
umaa wrote:Originally developed for detecting air pollutions, 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 archeology, criminology and medicine.

A.
B. Originally developed for detecting air pollutions, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called photon-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 quickly and without destroying the substance, called proton-induced x-ray emission,
To me all are wrong.
I had forgotten that "None of the above" is not an option in GMAT :). Rule is select the best among the given options.
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