The most pure form of carbon among the options is
1). Anthracite
2). Lampblack
3). Graphite
4). Wood Charcoal
1. The mineral containing both magnesium and calcium is
2. Which mineral is the ore Of aluminium
3. The gas which is mainly responsible for the green house effect is:
4. Percentage of lead in lead pencils is
5. 'Atomic theory' of matter was given by
6. Which of the following is used to denature ethanol ?
7. Chemically ‘Quick Silver' is known as
8. The chemical name of ratpoison is H
9. Question 3.26:What are the major differences between metals and non-metals?
10. Question 9.12:How do you expect the metallic hydrides to be useful for hydrogen storage? Explain.