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