Which of the following is used as a lubricant in heavy machines?
1). Bauxite
2). Sulphur
3). Phosphorus
4). Graphite
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1. Which of the following Sultans of Tughlaq dynasty issued copper coins instead of silver ones?
3. Question 16.16:Why is use of aspartame limited to cold foods and drinks?
4. Fermentation is a type of _____ _______ process .
5. Which one is the most reactive gaseous element?
6. The material known in commerce as Terylene is a