Galvanization of iron is carried out using
1). Zinc
2). Tin
3). Copper
4). Chromium
1. Who first published the periodic table?
2. In nuclear raeactors the speed of neutrons is slowed down by -
3. In nuclear reactors graphite is used as a an
4. Which substance is used to retard the setting action of cement?
5. The chemical(s) most commonly used for cloud seeding or artificial rainmaking is are
6. Cement containing excess amount of lime
8. The greenhouse effect is caused by the higher level of which gas in the atmosphere ?