Question

Define the following:
1. Thermite Welding
2. Roasting
3. Calcination
4. Gangue
5. Amalegum
6. Aquaragia

Answer 1

Following are the definitions...

1. It is a welding process that employs molten metal to permanently join the conductors.
2. It means  very hot.
3. It means heating a substance to a high temperature, but below its melting point, to bring about thermal decomposition.
4. It is the earthy waste substances occurring in metallic ore .
5.It is not amalegum it is amalgam which means a mixture or blend.
6. It is not aquaragia it is aqua regia which is a mixture of hydrochloric acid (HCl) and nitric acid (HNO3) at a ratio of either 3:1 or 4:1. It is a reddish-orange or yellowish-orange fuming liquid.