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