Amalgams are:
A). Highly coloured alloys
B). Alloys which contain mercury as one of the contents
C). Alloys which have great resistance to abrasion
D). Alloys which contain carbon
Alloys which contain mercury as one of the contents
Alloys which contain mercury as one of the contents.
1. In upper layer of atmosphere ozone is formed
2. Pure water is bad conductor of electricity because it is
3. Among the following the hardest metal is
4. Which of the following is the petroleum wax ?
5. The type of glass used in making lenses and prisms is
6. Osmoregulation is control over the
7. Plaster of Paris is made by partial dehydration of
8. Bleaching powder is used in drinking water as a an
9. When water itself combines chemically with some element or mineral it is called