Flash Card
In anodization, aluminium is coated with a thin strong and uniform layer of
Which of the following is a good conductor of electricity?
.........metal has the hightes melting point.
When a copper strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test-tube,
If wire of A is immersed in the salt solution of B. wherein B is more reactive than A
When a corroded copper article is dipped in silver nitrate solution,
Gold plated ornaments are the examples of
which of the following non metal is lustrous?
Corrosion of silver causes a black layer of
In the Wilfiey table method, the particles of gangue are separated by........separation method.
In galvanizing method,............. applied on iron.
Which of the following statements is INCORRECT?
The soft metal which can be cut with knife is ,..............
Iron is
When an aluminium strip is immersed into ZnSO4 solution, the colour of the solution
Which of the following statements incorrect about leaching process to concentrate ores?
If A is more reactive than metal B
What is the colour of the flame when copper metal is burned on the flame?
Fe2O3 +2AI - 2Fe+ AI2O3 + HEAT ,In the above reaction,........ undergoes reduction.
The hardest among the following metal is.....
The minerals from which the metal can be separated economically are called
Which of the followng nonmetal is a liquid?
The sound of one metal colliding with another metal a noise, this property is called....
Cassiterite is an ore of....metal.
Which of the following statements is INCORRECT?
Nonmetals are also called
Diamond is an allotrope of......
Priyanka introduced an iron nail in a test-tube containing freshly prepared copper sulphate solution. What would she observe?
In the electrolysis of alumina, aluminium is deposited at .................. while oxygen is liberated at......
Ionic compounds ure soluble in
Cassiterite ore is concentrated by
Which of the following sets of oxides is acidic?
Aluminium oxide is.......... in nature.
Which of the following is the method to concentrate ore?
Which of the following is responsible for the crystal structures in ionic compounds?
In which of the following pairs will the displacement reaction occur?
The chemical formula of copper pyrite is
Copper loses its lustre due to formation of......... on surface.
.............exist in liquid state at room temperature.
Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion?
