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