1. Which allotropy of carbon is in rigid three dimensional structures?
2. The color of blue glass is due to the presence of oxide of
3. Which Nobel gas was discovered in chromospheres of the sun?
4. Which one of the following is used for writing on glass?
5. Monazite is an ore of
6. The excess use of ethyl alcohol damage s the human organ which is
7. The pure form of carbon is
8. Which among the following is an element?
9. Which one of the following is also called stranger gas
10. What is the colour of oxygen in solid?
11. An emulsion is colloid of a
12. Fog is an example of
13. Which one of the following metals occurs in nature in Free State
14. Which of the purest form of iron?
15. Solder is an alloy of
16. The abundant metal in the earth's crust is
17. Which one of the following is the softest metal?
18. Which one of the following is not and ore
19. German silver is an alloy of
20. First metal used by man was
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