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प्रश्न
Tinning : Tin : : Galvanizing : _________
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उत्तर
Tinning : Tin : : Galvanizing : Zinc
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संबंधित प्रश्न
Why do we apply paint on iron articles?
Which metals do not corrode easily?
Answer the following question.
What are alloys?
Explain why Iron sheets are coated with zinc during galvanization.
Why is an iron grill painted frequently?
Name any two metals which do not corrode easily.
Explain why, when a copper object remains in damp air for a considerable time, a green coating is formed on its surface. What is this process known as?
No chemical reaction takes place when granules of a rusty-brown solid A are mixed with the powder of another solid B. However, when the mixture is heated, a reaction takes place between its components. One of the products C is a metal and settles down in the molten state while the other product D floats over it. It was observed that the reaction is highly exothermic.
(a) What could the solids A and B be?
(b) What are the products C and D most likely to be?
(c) Write the chemical equation for the reaction between A and B leading to the formation of C and D. Mention the physical states of all the reactants and products in this equation and indicate the heat change which takes place.
(d) What is the special name of such a reaction? State one use of such a reaction.
(e) Name any two types of chemical reactions under which the above reaction can be classified.
State under what conditions corrosion is faster ?
Write scientific reasons.
Lemon or tamarind is used for cleaning copper vessels turned greenish.
State whether the statement given below is true or false. If false write the correct statement.
Either oxygen or moisture is essential for rusting.
_______ forms a green colour in the water.
The process of coating the surface of the metal with a thin layer of zinc is called ______
Give the equation for the formation of rust.
Amalgam is an alloy of ____________.
Which among the following alloys contain mercury as one of its constituents?
Galvanisation is a process used to prevent the rusting of which of the following?
Give an example of a chemical reaction for the following situation:
Sound is produced
| A process of forming a thick oxide of aluminium when aluminium is exposed to air. This coat makes it resistant to corrosion. Resistance can be improved by making a layer of oxide thinker. In this technique, the aluminium article is the anode, and the electrolyte is sulphuric acid. The anode reaction results in the formation of a black-coloured film of aluminium oxide on the anode. By putting appropriate dyes in the electrolytic solution, both coloured surface with the decorative finish is achieved. Kitchen articles like anodised such as pressure cookers, pans and frames of sliding windows are applications of this technique. |
- Name the anode and electrolyte used in this technique.
- How can we make aluminium articles made resistant to corrosion?
- Name the technique used to coat the aluminium articles.
