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प्रश्न
Iron is _______.
विकल्प
more reactive than zinc
more reactive than aluminium
less reactive than copper
less reactive than aluminium
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उत्तर
Iron is less reactive than aluminium.
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संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
Define the Ore.
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?
Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
Give reasons, why aluminum is used in:
In aluminiothermy
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Name the following:
Two metals which are found in the free or native state.
Name the following:
Name two metals always find in combined state.
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
Answer the following question :
What is the difference between calcination and roasting.
Find the odd one out and give its explanation.
Write the name.
Extraction of aluminium from alumina-
Right or wrong sentence?
The electrolysis of alumina combines fluorite and cryolite to increase the solubility in the precipitation method.
Identify who I am!
Ore of Aluminum- ______
Explain Bayer’s process.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
