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Although fullerenes-spherical molecules made entirely of carbon-were f

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Re: Although fullerenes-spherical molecules made entirely of carbon-were f [#permalink]

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New post 23 Mar 2017, 18:02
Although fullerenes—spherical molecules made entirely of carbon—were first found in the laboratory, they have
since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of
fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a
test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring
fullerenes were formed. Which of the following, if true, most seriously undermines the argument?

A. Confirming that the shungite genuinely contained fullerenes took careful experimentation.
B. Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
C. The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
D. The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
E. Shungite itself is formed only under distinctive conditions.

Can somebody please help me with this one.

Last edited by Vyshak on 23 Mar 2017, 22:53, edited 1 time in total.
Topic Merged. Refer to the previous discussions.

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Re: Although fullerenes-spherical molecules made entirely of carbon-were f [#permalink]

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New post 24 Mar 2017, 09:07
Although fullerenes-spherical molecules made entirely of carbon-were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypothesis about the state of the Earth's crust at the time these naturally occuring fullerenes were formed.

Which of the following, if true, most seriously undermines the argument?
Note:
first found in the laboratory.

conclusion:
Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypothesis about the state of the Earth's crust at the time these naturally occuring fullerenes were formed.

Ask is weaken the conclusion :

what if the laboratory formed ones are NOT the same as the natural ones (structure wise). ?
Conclusion is weakened.

A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.
no mention of genuineness.
B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
not a matter of concern.
C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
may be. nothing to be concerned about.
D) The naturally occuring fullerenes are arranged in a previously unknown crystalline structure.
That suggests - the laboratory formed ones are NOT the same as the natural ones
CORRECT.
E) Shungite itself is formed only under distinctive conditions
No one cares.
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Re: Although fullerenes-spherical molecules made entirely of carbon-were f [#permalink]

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New post 22 Aug 2017, 11:14
could anyone explain option C ?

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Re: Although fullerenes-spherical molecules made entirely of carbon-were f [#permalink]

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New post 24 Aug 2017, 10:48
shekyonline wrote:
Although fullerenes-spherical molecules made entirely of carbon-were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypothesis about the state of the Earth's crust at the time these naturally occuring fullerenes were formed.

Which of the following, if true, most seriously undermines the argument?
Note:
first found in the laboratory.

conclusion:
Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypothesis about the state of the Earth's crust at the time these naturally occuring fullerenes were formed.

Ask is weaken the conclusion :

what if the laboratory formed ones are NOT the same as the natural ones (structure wise). ?
Conclusion is weakened.

A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.
no mention of genuineness.
B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
not a matter of concern.
C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
may be. nothing to be concerned about.
D) The naturally occuring fullerenes are arranged in a previously unknown crystalline structure.
That suggests - the laboratory formed ones are NOT the same as the natural ones
CORRECT.
E) Shungite itself is formed only under distinctive conditions
No one cares.


I take that GMAT requires us to select the best choice. I marked B as my answer which is obviously wrong here.

Can you help clarify why B is out of scope. It very well undermines the premise that FULLERENES are now found in nature. This is a premise itself. and the hypothesis that has to be verified is concerned with the state of the earth when FULLERENES were formed. The FULLERENES may not be natural at all.

this is how I interpreted it.
Why D is incorrect , it says the Structure is different, which is okay because Fullerenes discovered in LAB are spherical and hypothesis is concerned with Natural FFULLERENES formation.

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Re: Although fullerenes-spherical molecules made entirely of carbon-were f [#permalink]

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New post 28 Oct 2017, 00:24
it seems that we need full knowledge of chemistry before we work out this CR >,<
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Re: Although fullerenes-spherical molecules made entirely of carbon-were f   [#permalink] 28 Oct 2017, 00:24

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