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Although fullerenes - spherical molecules made entirely of carbon

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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 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.

Official Answer

2 Answers

Priyank Shrivastava
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I followed this approach:
On the basis of lab grown fullerene, the argument makes a prediction that this discovery shall help geologists in evaluationg certain hypothesis about state of Earth's crust at the time of formation of naturally occuring fullerenes.

In these types of questions, the argument uses one sample ( lab grown fullerenes) to make ageneric conclusion about the whole population (Naturall fullerenes). 

Weakener: Whether these lab grown fullerenes exactly match the condition in which natural fullerenes occur? What if the conditions are different?. If this is true hat the conditions are different, then lab grown fullerenes are not representative of those fullerenes that were formed under natural conditions, hence this argument falls apart.
So answer is D

 

answered May 21, 2015 by Partner (785 points)
Meenakshi Jain
0
So its D!
laboratory synthesis of FULLERNESS requires distinctive conditions of temperature and pressure, and NATURALLY OCCURING FULLERNESS are arranged in a previously unknown crystalline structure.
If the naturally occurring element has a different crystalline structure (formed at different temperature=t1 and pressure=p1) how can you compare it with an element/FULLERNESS which has completely different crystalline structure(formed at different temperature=t2 and pressure=p2)
Thus Weakens the argument!
answered May 14, 2015 by Senior Associate (452 points)
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