BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Technique - Modifers

This topic has expert replies
Post new topic Locked
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 301
Joined: Tue Apr 22, 2008 6:07 am
Thanked: 2 times

Technique - Modifers

by beater » Mon Mar 09, 2009 12:55 pm
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,

What do you think which is referring to in (A)?
Please specify the modifier issues.

Thanks!
Top
Source: — Sentence Correction |
Master | Next Rank: 500 Posts
Posts: 107
Joined: Wed Mar 04, 2009 4:39 am
Location: Vancouver
Thanked: 9 times
GMAT Score:750

by pakaskwa » Tue Mar 10, 2009 3:19 am
In general, a modifier should be right next to the subject it is modifying.

In choice A, "which" is misplaced as it's referring to "x-ray emission". (It's actually a clause, not a modifier.)

IMO, answer is E. What's the OA?
Top
Legendary Member
Posts: 1035
Joined: Wed Aug 27, 2008 10:56 pm
Thanked: 104 times
Followed by:1 members

by scoobydooby » Tue Mar 10, 2009 10:51 am
A seems fine

the sentence says: a technique called proton-induced x-ray emission is finding uses in X,Y and Z

modifier 1: "Originally developed for detecting air pollutants" modifies "a technique" correctly

modifier 2: "which can quickly analyze the chemical elements in almost any substance without destroying it" is set off within commas, and is a non restrictive modifier, it gives more info on the technique and correctly modifies"technique"

it might seem that this "which" modifies emission, but it actually modifes "technique". emission must not be considered on its own-it is part of "proton-induced x-ray emission" which is nothing but another name of this technique.

so even though "which" is closer to "emission" than "technique", it modifies "technique" correctly.
Top
Master | Next Rank: 500 Posts
Posts: 160
Joined: Fri May 30, 2008 7:10 pm
Thanked: 10 times
GMAT Score:600

by dendude » Tue Mar 10, 2009 5:00 pm
I agree, A is fine.
Top
Master | Next Rank: 500 Posts
Posts: 301
Joined: Tue Apr 22, 2008 6:07 am
Thanked: 2 times

by beater » Tue Mar 10, 2009 6:42 pm
Isn'tWhich (in A) supposed to modify the immediately preceding noun?

I understand it doesn't sound logical for which to refer to emmisions, but I'm just going by the rules. Is this sentence an exception?
Top
Legendary Member
Posts: 1035
Joined: Wed Aug 27, 2008 10:56 pm
Thanked: 104 times
Followed by:1 members

by scoobydooby » Tue Mar 10, 2009 10:02 pm
a technique (called proton-induced x-ray emission), which can

yes, "which" modifies the immediately preceding noun. but here "emission" is a part of the underlined phrase which modifies the noun "technique". the underlined phrase thus does the work of an adjective.

the immediately preceding noun is "technique". so "which" actually modifies "technique".
Top
Master | Next Rank: 500 Posts
Posts: 107
Joined: Wed Mar 04, 2009 4:39 am
Location: Vancouver
Thanked: 9 times
GMAT Score:750

by pakaskwa » Tue Mar 10, 2009 10:06 pm
Actually there's explanation on OG 11. OA is A.

This is question 105 in SC section in OG 11. Explanation is on page 710. It says,
Finally, the non-restrictive clause "which...destroy it" is correctly placed next to "emission" and set off from the rest of the sentence by a pair of commas.

Which clause here is modifying "X-ray emission", and that's the technique's name, which is the same as technique.
Top
Master | Next Rank: 500 Posts
Posts: 424
Joined: Sun Dec 07, 2008 5:15 pm
Location: Sydney
Thanked: 12 times

by piyush_nitt » Wed Mar 11, 2009 1:19 am
pakaskwa wrote:Actually there's explanation on OG 11. OA is A.

This is question 105 in SC section in OG 11. Explanation is on page 710. It says,
Finally, the non-restrictive clause "which...destroy it" is correctly placed next to "emission" and set off from the rest of the sentence by a pair of commas.

Which clause here is modifying "X-ray emission", and that's the technique's name, which is the same as technique.
Whats wrong with C then ?
Top
Master | Next Rank: 500 Posts
Posts: 107
Joined: Wed Mar 04, 2009 4:39 am
Location: Vancouver
Thanked: 9 times
GMAT Score:750

by pakaskwa » Wed Mar 11, 2009 12:14 pm
Here's the explanation on OG for choice C, it looks conflicting with choice A explanation though:

Called proton-induced X-ray emission should be placed next to a technique and should not be set off by commas; relative clause introduced by which incorrectly and illogically modifies emission.

If which clause is misplaced here, isn't it misplaced too in Choice A? Anybody?
Top
Master | Next Rank: 500 Posts
Posts: 160
Joined: Fri May 30, 2008 7:10 pm
Thanked: 10 times
GMAT Score:600

by dendude » Wed Mar 11, 2009 12:34 pm
Here's how I see it.
The which in A correctly modifies proton-induced x-ray emission because it is qualified by "a technique".
(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,

Though it can be argued that the which in C also correctly modifies proton-induced x-ray emission, if you look closely you will realize another mistake. The first comma offsets air pollutants as proton-induced x-ray emmission.
(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,
Top
Master | Next Rank: 500 Posts
Posts: 107
Joined: Wed Mar 04, 2009 4:39 am
Location: Vancouver
Thanked: 9 times
GMAT Score:750

by pakaskwa » Wed Mar 11, 2009 3:58 pm
That makes sense. Thanks dude!
Top
Senior | Next Rank: 100 Posts
Posts: 53
Joined: Wed Jan 14, 2009 7:58 pm
Location: india
Thanked: 2 times
GMAT Score:700

by moorthy76 » Thu Mar 12, 2009 4:05 am
i agree with scoobydooby...
Best Regards,
Surya
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 2228
Joined: Wed Dec 27, 2006 3:28 pm
Location: Montreal, Canada
Thanked: 639 times
Followed by:694 members
GMAT Score:780

by Stacey Koprince » Thu Mar 12, 2009 8:31 am
Received a PM asking me to respond. This is a tough one. Several of you have explained various aspects correctly above; I'll just summarize here.

In general, a noun modifier should be placed next to the noun it modifies. "Which" indicates a noun modifier, so it should follow this rule.

There is a rare exception though - you can have a few additional words between the noun being modified and the "which" clause as long as the words in between are a direct and necessary description of the noun being modified.

Her aura of invincibility, which really irritated some people, was completely destroyed when she lost her job.

Here, "which" is modifying "aura" even though we have "of invincibility" in between. The "of" prepositional phrase is just a short modifier describing "aura" - and there's really no other place to put it.

Similiary, with "a techique called <blah blah blah>" - the "called etc" part is just a short descriptive of the word "technique," so it qualifies for this rare exception.

The trouble comes in when you separate "a technique" and "called <blah blah blah>," as in answer C. Now, the which part is technically describing "emission" and only "emission" - and the problem there is that we don't actually know what is "called proton-induced X-ray emission." Is it the technique? Or is it the air pollutants? Even though we know logically that it's the technique, structurally it seems to be the air pollutants. That's ambiguous - and ambiguity is bad. D and E have similar problems with this issue.
Please note: I do not use the Private Messaging system! I will not see any PMs that you send to me!!

Stacey Koprince
GMAT Instructor
Director of Online Community
Manhattan GMAT

Contributor to Beat The GMAT!

Learn more about me
Top
Post new topic Locked
• Page 1 of 1