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