Quartz crystals normally used in quartz clocks etc. is chemically
A). Silicon Dioxide
B). A mixture of Germanium Oxide and Silicon dioxide
C). A mixture of Germanium Oxide and Silicon dioxide
D). Sodium Silicate
1. The cells constituting walls of the blood capillaries are known as
2. Ethanol containing 5%. water is known as
3. Which of the following gases will effuse out of football bladder most quickly?
4. PVC is obtained by the polymerisation of
5. Which of the following in automobile exhaust can cause cancer?
6. Which one of the following is used for dating very old objects of archaeological importance?
7. Rise of oil a wick is due to
8. Black lung disease occurs in people working in
9. The addition of gypsum to Portland cement helps in :
10. Which of the following acids is called the king of the acids?