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