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