Which of the following alloy has copper as its constituent?
Which of the following does not corrode?
Solder is an alloy of:
Ruthenium (Ru) and platinum (pt) are
An alloy of iron, chromium and nickel is:
The purity of pure gold in carat is:
Alloying is not done for which of the following purpose?
alloying a metal ,its properties not degrade but they show the upgrade qualities like high tensile strength,lustrous etc .New substance formed by the alloying ,like brass is the result of alloying.
Which of the following metal is always a constituent of an amalgam?
In galvanization, iron is coated with a layer of:
Minerals from which metals are extracted are called:
Which of the following is not a half-metal?
Chlorine os the second halogen, being a non - metal in group 17 of the periodic table. It's not a half metal because it is a now metal.
Anodising is done in case of:
Anodising is a process of forming a thick oxide layer of aluminum. This aluminium oxide coat makes it resistant to further corrosion.
The Homogeneous mixture of two or more metals or a metal and a non-metal is called an:
An alloy is a homogenous mixture of two or more metals or non metals mixed in a molten state.
Give the composition of brass.
Silver articles become black when exposed to air due to formation of:
The silver article becomes black after sometimes when exposed to air because silver reacts with sulphur which is present in the atmosphere and then forms silver sulphide. Thus the layer of this silver sulphide is formed on the surface of the silver article so they appear as dull or black.