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