Consider the following statements regarding diamond : 1. It is an allotrope of silicon. 2. It is a bad conductor of heat and electricity. 3. Tt is the hardest substance. 4. It burns to produce carbon dioxide Which of the statements given above are correct

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Q: 97 (NDA-I/2009)
Consider the following statements regarding diamond :
1. It is an allotrope of silicon.
2. It is a bad conductor of heat and electricity.
3. Tt is the hardest substance.
4. It burns to produce carbon dioxide
Which of the statements given above are correct?
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question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,28,9,5,28,2,2

keywords: 

{'diamond': [0, 0, 3, 3], 'hardest substance': [1, 0, 0, 0], 'silicon': [0, 0, 1, 0], 'carbon dioxide': [2, 0, 5, 6], 'bad conductor': [0, 0, 0, 1], 'electricity': [0, 0, 1, 3], 'heat': [10, 3, 13, 46], 'allotrope': [0, 0, 0, 1]}