Of the following which one pollutes the air of abig city
1). Copper
2). Chromium
3). Lead
4). Calcium
1. In which of the following substances all carbon atoms are quaternary in nature ?
2. Chemical name of bleaching powder is
3. Which among the following is not a characteristic of oxidation reaction?
5. Diamond is harder than graphite because of
6. Vinegar and Baking Soda together produce ____________.
7. The metal does not give H2 on treatment with dilute HCL is
8. The freezer in a refrigerator isfitted near the top
9. Among the fuels given below the one with highest calorific value is
10. Which one of the following pairs is NOT correctly matched?