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