Find all School-related info fast with the new School-Specific MBA Forum

It is currently 24 Oct 2014, 05:36

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Spectroscopic analysis has revealed the existence of frozen

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Retired Moderator
User avatar
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1726
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 68

Kudos [?]: 332 [0], given: 109

Spectroscopic analysis has revealed the existence of frozen [#permalink] New post 10 May 2012, 08:44
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

42% (02:55) correct 58% (01:47) wrong based on 353 sessions
Spectroscopic analysis has revealed the existence of frozen nitrogen, methane, and carbon monoxide on the surface of Pluto. Such ices have a tendency to vaporize, producing an atmosphere. Since the proportion of any gas in such an atmosphere depends directly on how readily the corresponding ice vaporizes, astronomers have concluded that the components of Pluto’s atmosphere are nitrogen, carbon monoxide, and methane, in order of decreasing abundance.

The astronomers' argument relies on which one of the following assumptions?

(A) There is no more frozen nitrogen on the surface of Pluto than there is either frozen carbon monoxide or methane.
(B) Until space probes reach Pluto, direct analysis of the atmosphere is impossible.
(C) There is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide.
(D) Nitrogen is found in the atmosphere of a planet only if nitrogen ice is found on the surface of that planet.
(E) A mixture of nitrogen, carbon monoxide, and methane is characteristic of the substances from which the Solar System formed.

OA is
[Reveal] Spoiler:
C.

I agree with the OA. However, I have a doubt with choice A. If we use the negation technique, and we assume that "there is MORE frozen nitrogen on the surface of Pluto than there is either frozen carbon monoxide or methane". The conclusion could be weakened. Let me explain:

The argument says that the the RATE OF EVAPORIZATION of each ice (readiness) determines the proportion of each gas in the atmosphere. However, let's suppose that Nitrongen (the most abundant in atmosphere) has the lowest rate of evaporation but it is the most abundant as ice on the surface ( my negation technique). Nitrogen would be the most abundant in atmosphere not by the rate of evaporization, but by the amount of nitrogen on the surphace. The reasoning of the author would be weakened

Thanks!
[Reveal] Spoiler: OA

_________________

"Life’s battle doesn’t always go to stronger or faster men; but sooner or later the man who wins is the one who thinks he can."

My Integrated Reasoning Logbook / Diary: my-ir-logbook-diary-133264.html

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Expert Post
Magoosh GMAT Instructor
User avatar
Joined: 28 Nov 2011
Posts: 305
Followers: 308

Kudos [?]: 488 [0], given: 2

CAT Tests
Re: Spectroscopic analysis [#permalink] New post 12 May 2012, 15:47
Expert's post
Hi Metallicafan,

It seems as though you are making your own assumption when you defend (A). That for there to be more nitrogen in the atmosphere, there need only be more frozen nitrogen. If that were the case, then the answer could be (A).

Also, I think that when the argument says, "Since the proportion of any gas..." that is a premise upon which the conclusion (the distribution of methane, etc.) is based. When looking for an assumption, we want to find that gap between the premise and the conclusion.

Let me know if that makes sense :)
_________________

Christopher Lele
Magoosh Test Prep


Image

Image

Expert Post
Magoosh GMAT Instructor
User avatar
Joined: 28 Nov 2011
Posts: 305
Followers: 308

Kudos [?]: 488 [0], given: 2

CAT Tests
Re: Spectroscopic analysis [#permalink] New post 15 May 2012, 13:07
Expert's post
The conclusion states that, in decreasing abundance, the elements on Pluto are nitrogen, carbon monoxide, and methane. This conclusion assumes that there are no other elements that would disrupt this ranking. Namely, an element that would vaporize less readily than carbon monoxide or more readily than methane.

Hope that helps!
_________________

Christopher Lele
Magoosh Test Prep


Image

Image

Intern
Intern
avatar
Joined: 22 Feb 2010
Posts: 49
Followers: 0

Kudos [?]: 7 [0], given: 1

GMAT ToolKit User
Re: Spectroscopic analysis [#permalink] New post 22 May 2012, 06:53
ChrisLele wrote:
The conclusion states that, in decreasing abundance, the elements on Pluto are nitrogen, carbon monoxide, and methane. This conclusion assumes that there are no other elements that would disrupt this ranking. Namely, an element that would vaporize less readily than carbon monoxide or more readily than methane.

Hope that helps!


I am confused with the wording of C. Using the data, can't we say that Nitrogen is the third gas that vaporizes more readily than carbon monoxide?

I took Choice D to mean that the analogy would hold true for other gases as well. Does not that make it a good choice?
Manager
Manager
avatar
Joined: 01 Jan 2013
Posts: 68
Location: India
Followers: 0

Kudos [?]: 12 [0], given: 130

GMAT ToolKit User CAT Tests
Re: Spectroscopic analysis [#permalink] New post 09 Apr 2014, 21:14
ChrisLele wrote:
The conclusion states that, in decreasing abundance, the elements on Pluto are nitrogen, carbon monoxide, and methane. This conclusion assumes that there are no other elements that would disrupt this ranking. Namely, an element that would vaporize less readily than carbon monoxide or more readily than methane.

Hope that helps!

what if the volume of surface elements other than given in premise are very less but they vaporize more readily than these.
Hence they wont affect the rankings.
Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Status: Tomorrow will be a new day...
Joined: 22 Mar 2013
Posts: 943
Location: India
GPA: 3.51
WE: Information Technology (Computer Software)
Followers: 44

Kudos [?]: 413 [0], given: 210

Re: Spectroscopic analysis has revealed the existence of frozen [#permalink] New post 23 Apr 2014, 15:46
even if any 4th gas exist, it can fit anywhere without disturbing the order of decreasing abundance.

Nitrogen is more than CO2 \\ CO2 is more than CH4

I am not sure how C is disturbing this order of decreasing abundance ?
_________________

Piyush K
-----------------------
Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison
Don't forget to press--> Kudos :)
My Articles: 1. WOULD: when to use? | 2. All GMATPrep RCs (New)
Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Senior Manager
Senior Manager
User avatar
Joined: 17 Sep 2013
Posts: 311
Location: United States
Concentration: Marketing, Strategy
GMAT Date: 04-30-2014
GPA: 3.24
WE: Analyst (Consulting)
Followers: 4

Kudos [?]: 35 [0], given: 116

GMAT ToolKit User Premium Member CAT Tests
Re: Spectroscopic analysis has revealed the existence of frozen [#permalink] New post 26 Apr 2014, 02:33
I see D as a contender too..

1/4 of the Pluto's surface is covered with Nitrogen Ice...1/4 Is Methane and..1/4 is CO2...1/4 is Miscellaneous

Astronomers predict Nitrogen is most abundant followed by methane and CO2..
Basis of Prediction:
As they are present on the surface in Ice forms and the tendency of Nitrogen to vaporize is the highest among the 3..Thus Nitrogen will exist in Pluto's atmosphere and that it will be the most abundant gas

Scenarios:
But what if there is a Volcano emitting Nitrogen gas..Though this fact does not disrupt the ranking..it shows an underlying assumption which is - the astronomers predict that Nitrogen is produced only thru the processes stated in the premise
_________________

Appreciate the efforts...KUDOS for all


Last edited by JusTLucK04 on 30 Apr 2014, 07:25, edited 1 time in total.
Intern
Intern
avatar
Joined: 24 Dec 2012
Posts: 31
Concentration: Entrepreneurship, Social Entrepreneurship
WE: Design (Computer Software)
Followers: 0

Kudos [?]: 10 [0], given: 51

Re: Spectroscopic analysis [#permalink] New post 27 Apr 2014, 22:37
ChrisLele wrote:
The conclusion states that, in decreasing abundance, the elements on Pluto are nitrogen, carbon monoxide, and methane. This conclusion assumes that there are no other elements that would disrupt this ranking. Namely, an element that would vaporize less readily than carbon monoxide or more readily than methane.

Hope that helps!


Please can you explain it further???
Re: Spectroscopic analysis   [#permalink] 27 Apr 2014, 22:37
    Similar topics Author Replies Last post
Similar
Topics:
6 Experts publish their posts in the topic Art Historian: Recently, computer analysis has revealed that mba1382 17 10 Feb 2014, 06:20
5 Experts publish their posts in the topic The existence of water on Mars has been the focus of intense actleader 8 31 Oct 2012, 11:46
frozen corpse lucyqin 15 15 May 2008, 08:42
Handwriting analysis has recently been boosted by the Pokhran II 8 13 Aug 2005, 00:31
2 Spectroscopic analysis has revealed the existence of frozen chunjuwu 24 14 Mar 2005, 00:39
Display posts from previous: Sort by

Spectroscopic analysis has revealed the existence of frozen

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.