Which one among the following is not a mixture?

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Q: 87 (NDA-II/2011)

Which one among the following is not a mixture?

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,15,9,15,4,3,2

keywords: 

{'mixture': [0, 0, 1, 5], 'graphite': [0, 0, 3, 9], 'brass': [0, 0, 1, 1], 'steel': [0, 1, 1, 0], 'glass': [0, 0, 1, 4]}

In this question, we are asked to identify which of the given options is not a mixture.

Option 1: Graphite

Graphite is a form of carbon that consists of only one element. It is not a mixture because it does not contain different substances mixed together. Therefore, option 1 is not a mixture.

Option 2: Glass

Glass is a solid material that is made by melting different substances together, such as silica, soda, and lime. It is a mixture because it contains multiple components mixed together. Therefore, option 2 is a mixture.

Option 3: Brass

Brass is an alloy made by combining copper and zinc. It is considered a mixture because it is composed of different substances mixed together. Therefore, option 3 is a mixture.

Option 4: Steel

Steel is an alloy made primarily from iron and carbon. Like brass, it is a mixture because it contains different components blended together. Therefore, option 4 is a mixture.

Based on the explanations above, we can conclude that the correct answer is option 1, Graphite, which is not a mixture.

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