Advertisements
Advertisements
Question
Give reason.
An iron article should be given a coat of paint
Advertisements
Solution
Iron articles often undergo rusting, resulting in the formation of a reddish-brown layer on their surface. Rusting is caused by the exposure of iron to the air and water in the surroundings. An iron article that is coated with paint prevents the interaction of iron with the surrounding air and water and thus protects it from rusting.
RELATED QUESTIONS
Which metals do not corrode easily?
What are alloys?
Name an alloy of copper. State its chemical composition and any one use.
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.
- What could the solids A and B be?
- What are the products C and D most likely to be?
- 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.
- What is the special name of such a reaction? State one use of such a reaction.
- Name any two types of chemical reactions under which the above reaction can be classified.
Corrosion can be an advantage in some case.Explain ?
Explain with reason:
Roasting is carried out on sulphide ores and not on carbonate ores.
Stainless steel is an alloy of _______.
Find the odd one out and give its explanation.
Observe the following diagram and write answers.

- Name the method.
- Explain the method.
- Give two examples of this method.
Give an example of a chemical reaction for the following situation:
Sound is produced
