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