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