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