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