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