PVC is obtained by the polymerisation of
1). Propane
2). Vinyl chloride
3). Styrene
4). Acetylene
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1. The mass number of a nucleus is.
2. Which of the following is a monoatomic gas?
3. Question 9.30:The oxidation number of cobalt in K[Co(CO)4] is(i) 1(ii) 3(iii) −1(iv) −3
4. The Chemical formula of Urea is
6. Which one of the following elements is used in the manufacture of safety matches?
8. The most reactive among the halogens is
9. Gunpowder consist ofa mixture of
10. What is the element required for solar energy conversion ?