Which of the following type of coal has the lowest proportion of volatile matter ?
1). Lignite
2). Peat
3). Bituminous
4). Anthracite
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1. The first metal used by a man was
2. An example of semiconductor is
3. The element with highest first ionisation energy is
4. Milk tastes sour when it is left in open for some time.This happens due to the formation of
5. Which of the following elements is non radioactive
6. Question 16.10:How do antiseptics differ from disinfectants? Give one example of each.
7. Which one of the following minerals is found in pure form
8. The purest form of water is