Natural rubber is the polymer of:
1). isoprene
2). Styrene
3). Butadiene
4). Ethylene
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1. The mass number of an atom is equal to
2. The degree of dissociation of an electrolyte depends on
4. This group of alumino silicate minerals is widely used In making electrical insulators
5. In the electroplating of gold, the electrolyte used is
7. An example of replenshible energy source is
8. Question 7.11:Explain why NH3 is basic while BiH3 is only feebly basic.