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