Advertisements
Advertisements
Question
Complete flow chart given below.
Advertisements
Solution
RELATED QUESTIONS
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Name two metals which are highly resistant to corrosion.
Name the metal which is extracted from haematite ore.
Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
Give reasons, why aluminum is used in:
In making ships
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
How are metals refined by the electrolytic methods?
Explain the following:
Galvanization protects iron from rusting.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Zinc blende is converted to oxide by ______ process.
Zinc sulphide : Roasting : : zinc carbonate : _______
Mercury, silver, gold are highly reactive metals.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
Explain Bayer’s process of concentration of bauxite with a chemical equation.
