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