Which one of the following is extensively used for sterilizing water ?
1). Bleaching powder
2). Alum
3). Borax powder
4). Soda powder
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1. Natural rubber is the polymer of :
2. _______ is an anaesthetic agent.
3. Galvanization of iron is carried out using
5. Of the following which one pollutes the air of abig city
7. Barium loses ____ electrons to achieve noble gas electron configuration.
8. In the electroplating of gold, the electrolyte used is
9. The wire of flash bulb is made of:
10. Which of the following gases is present under pressure in soft drinks