Wed. Jun 23rd, 2021

Chemistry Quiz 4

1. The hardest form of carbon is

2. The main active constituent of tea and coffee is

3. The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

4. The mineral containing both magnesium and calcium is

5. The major constituent of air is

6. The maximum number of isomers for an alkene with molecular formula C4H8 is

7. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

8. The metal does not give H2 on treatment with dilute HCL is

9. The main chemical constituent of clay is

10. The iron ore magnetite consists of