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प्रश्न
Iron is _______.
पर्याय
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
Define the Ore.
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Explain why, carbon cannot reduce oxides of sodium or magnesium.
Define the term gangue.
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
How is aluminium metal extracted? Explain with the help of an equation.
Which metal is extracted from bauxite ore?
An ore of manganese metal is ______.
Which of the following metals are extracted by the electrolysis of their molten chlorides?
A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.
- Name the metal X.
- Name the metal oxide XO2.
- Which reducing agent can be used to reduce XO2 to obtain metal X?
- Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Which method of refining is used to get 99.8% pure aluminium?
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
Explain Bayer’s process of concentration of bauxite with a chemical equation.
The poorest conductor of heat among metals is ____________.
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
