GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 18 Sep 2018, 10:56

### 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

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

# Spectroscopic analysis has revealed the existence of frozen

Author Message
TAGS:

### Hide Tags

SVP
Joined: 03 Jan 2005
Posts: 2159
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

16 Mar 2005, 10:46
amit_upasani@hotmail.com wrote:
Choice C => There is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide.
which contradicts #2 above. There actually are two substances that vaporize more readily than methane.

There are two substances that vaporize more readily than methane, but neither of them vaporize less readily than CO. So in other words, no substance vaporizes more readily than methane and less readily than CO. Therefore it is ok, not contraditing to your point #2.
Intern
Joined: 17 Feb 2005
Posts: 28
Location: SE Michigan
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

16 Mar 2005, 11:37
>> (C) There is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide.

However, it fills only one of the gaps. Nitro still has two positions left in the hierarchy.

What's the OA?
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 4918
Location: Singapore
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

16 Mar 2005, 19:38
amit_upasani@hotmail.com wrote:
>> (C) There is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide.

However, it fills only one of the gaps. Nitro still has two positions left in the hierarchy.

What's the OA?

Agree with you that (C) does fill only one gap, but i feel it holds up the conclusion much stronger than (A).

I'll stick with (C).

OA ?
VP
Joined: 26 Apr 2004
Posts: 1168
Location: Taiwan
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

16 Mar 2005, 20:01
Thank you all

All in all, the OA is indeed C.

Welcome more discussions.
Director
Joined: 21 Dec 2010
Posts: 516
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

07 May 2011, 11:53
another tricky one , where the exact wordings of an option can not be overlooked , i got this wrong. 'less readily than CO but more readily than methane' this sets a boundary condition between which no other substance can lie, and the way it is worded , makes one think about nitrogen being the substance which is more readily vaporized.
_________________

What is of supreme importance in war is to attack the enemy's strategy.

Manager
Joined: 06 Jun 2013
Posts: 173
Location: India
Concentration: Finance, Economics
Schools: Tuck
GMAT 1: 640 Q49 V30
GPA: 3.6
WE: Engineering (Computer Software)
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

17 Sep 2015, 11:37
I will go with C. initially i was stuck b/w A and C. A does not give any clear hint about the order, which is very much essential. C resolves this issue.
Manager
Joined: 03 Jul 2015
Posts: 56
Concentration: Marketing, Finance
Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

26 Apr 2016, 08:51
But C just addresses the fact that there is no gas between carbon monoxide and methane.
Maybe there is some gas between nitrogen and carbon monoxide.

Moreover A is a good assumption and also weakens it.
Manager
Status: folding sleeves up
Joined: 26 Apr 2013
Posts: 143
Location: India
Concentration: Finance, Strategy
GMAT 1: 530 Q39 V23
GMAT 2: 560 Q42 V26
GPA: 3.5
WE: Consulting (Computer Hardware)
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

08 Jun 2016, 23:54
chunjuwu wrote:
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 Plutoâ€™s atmosphere are nitrogen, carbon monoxide, and methane, in order of decreasing abundance.

The astronomersâ€™ 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 Provided

Lets assume that there is indeed a gas which vaporizes more readily than CM, but the abundance on the surface is less. The fact does not state that " ONLY three gases are found on the surface.
Manager
Status: folding sleeves up
Joined: 26 Apr 2013
Posts: 143
Location: India
Concentration: Finance, Strategy
GMAT 1: 530 Q39 V23
GMAT 2: 560 Q42 V26
GPA: 3.5
WE: Consulting (Computer Hardware)
Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

08 Jun 2016, 23:55
chunjuwu wrote:
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 Plutoâ€™s atmosphere are nitrogen, carbon monoxide, and methane, in order of decreasing abundance.

The astronomersâ€™ 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 Provided

Lets assume that there is indeed a gas which vaporizes more readily than CM, but the abundance on the surface is less. The fact does not state that " ONLY three gases are found on the surface. There may be 5 more gases on the surface but they are in less quantity, so when they vaporize more readily than CO the amount in the atmosphere will be less.

So, how can C be correct answer?
Senior Manager
Status: You have to have the darkness for the dawn to come
Joined: 09 Nov 2012
Posts: 309
Daboo: Sonu
GMAT 1: 590 Q49 V20
GMAT 2: 730 Q50 V38
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

12 Nov 2016, 00:13
[quote="chunjuwu"]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 Plutoâ€™s atmosphere are nitrogen, carbon monoxide, and methane, in order of decreasing abundance.

The astronomersâ€™ 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.

Let's break down into premises and conclusion

Premsie 1:Spectroscopic analysis has revealed the existence of frozen nitrogen, methane, and carbon monoxide on the surface of Pluto.
Premise 2:Such ices have a tendency to vaporize, producing an atmosphere.
Premise 3: The proportion of any gas in such an atmosphere depends directly on how readily the corresponding ice vaporizes.

Conclusion: astronomers have concluded that the components of Plutoâ€™s atmosphere are nitrogen, carbon monoxide, and methane, in order of decreasing abundance.
As per the conclusion N2> CO> CH4

Think for a moment how astronmers conclude "N2> CO> CH4" based on the above primises
Possible assumption: rate of evaporation of N2 is greater than CO and rate of evoparation of CO is greater than CH4.
In one premise it was wtitten any (hilighted in red).
on the basis of this
No gas comes in between N2 and CO and in between CO and CH4.

Let's POE

(A) IncorrectThere is no more frozen nitrogen on the surface of Pluto than there is either frozen carbon monoxide or methane. we cannot assume this because nothing related to this is indicated in the passage. So, A is Irrrevelant.

(B) IncorrectUntil space probes reach Pluto, direct analysis of the atmosphere is impossible. Out of scope. No way this helps us to achieve the conclusion

(C) CorrectThere is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide. This mathches with our prethinking.
Don't forget to negate the correct option to checkoption's validity. If negated option invalidate the conclusion the that assumption is valid assumption.
Let's negate
There is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide. The negated version says there is some frozen substance in between then. Hence shatters our conclusion.

(D) IncorrectNitrogen is found in the atmosphere of a planet only if nitrogen ice is found on the surface of that planet. Nothing such can be assumend.

(E) IncorrectA mixture of nitrogen, carbon monoxide, and methane is characteristic of the substances from which the Solar System formed. This option is of no help

Hence C
_________________

You have to have the darkness for the dawn to come.

Give Kudos if you like my post

Manager
Joined: 30 Sep 2015
Posts: 52
Location: United States (MD)
Concentration: Marketing, Entrepreneurship
GMAT 1: 620 Q49 V25
GMAT 2: 620 Q49 V27
WE: Marketing (Consumer Products)
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

15 Nov 2016, 11:40
Here is my analysis

Argument structure
Conc: Astronomers have concluded that the components of Pluto's atmosphere are nitrogen, carbon monoxide, and methane, in order of decreasing abundance.
Basis of concusion (P): Since the proportion of any gas in such an atmosphere depends directly on how readily the corresponding ice vaporizes,
P1: Spectroscopic analysis has revealed the existence of frozen nitrogen, methane, and carbon monoxide on the surface of Pluto.
P2: Such ices have a tendency to vaporize, producing an atmosphere.

Pre-thinking
First thing to notice when you start reading the argument is that S analysis revealed the existence of 3 elements in Pluto (so you assume that could be more elements). But when you reach the conclusion, the author says that Astronomers have concluded that the components of Pluto's atmosphere are the same 3 elements (so no more element in Pluto's atmosphere). Now, the basis of the conclusion says that the abundance of each element in the atmosphere depends on how easily the frozen elements evaporate. Because the conclusion establishes an order of the abundance of each gas in Pluto's atmosphere, one can assume that there are only 3 element, that Nitrogen is the most abundant, and that CO is the least abundant.

(A) There is no more frozen nitrogen on the surface of Pluto than there is either frozen carbon monoxide or methane. Incorrect
No clue about the abundance of frozen gases in Pluto's surface.

(B) Until space probes reach Pluto, direct analysis of the atmosphere is impossible. OFS.

(C) There is no frozen substance on the surface of Pluto that vaporizes more readily than methane but less readily than carbon monoxide. Correct!
Aligned with pre-thinking. If negated, the conclusion of scientists is shattered.

(D) Nitrogen is found in the atmosphere of a planet only if nitrogen ice is found on the surface of that planet. OFS
Too broad in scope.. we are talking about Pluto in the argument. We can not make that generalization.

(E) A mixture of nitrogen, carbon monoxide, and methane is characteristic of the substances from which the Solar System formed. OFS
Too broad in scope.. we are talking about Pluto in the argument. Nothing is mention about Solar System
Current Student
Joined: 28 Nov 2014
Posts: 880
Concentration: Strategy
Schools: Fisher '19 (M)
GPA: 3.71
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

16 Nov 2016, 10:54
How do I confirm if there are only 3 gases in Pluto's atmosphere?

On negating B, even if I say that there is some gas between carbon monoxide and methane, then also the argument holds. Below, I have explained the negation of B diagrammatically

N, CO, X, CH4

Even in this case, the conclusion N, CO, CH4 is maintained?
Intern
Joined: 09 May 2018
Posts: 6
Re: Spectroscopic analysis has revealed the existence of frozen  [#permalink]

### Show Tags

22 Aug 2018, 03:06
I think A should be the correct answer. What do you think?
Re: Spectroscopic analysis has revealed the existence of frozen &nbs [#permalink] 22 Aug 2018, 03:06

Go to page   Previous    1   2   [ 33 posts ]

Display posts from previous: Sort by

# Events & Promotions

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.