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प्रश्न
Fill in the following blanks with suitable words:
............ and .............. are necessary for the rusting of iron.
उत्तर
Air (oxygen) and water are necessary for the rusting of iron.
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संबंधित प्रश्न
What is an alloy?
Which of the following methods is suitable for preventing an iron frying pan from rusting?
State two conditions for the rusting of iron.
Name five methods of preventing rusting of iron.
What are the constituents of stainless steel?
What are the special properties of stainless steel?
Name an alloy of copper. State its chemical composition and any one use.
In stainless steel alloy, iron metal is mixed with:
(a) Cu and Cr
(b) Cr and Ni
(c) Cr and Sn
(d) Cu and Ni
What is corrosion? What are necessary conditions for corrosion?
State under what conditions corrosion is faster ?
Choose the correct alternative and rewrite the following:
Iron is _____________________.
Give reason.
An iron article should be given a coat of paint
Write a short note on Alloying.
Observe the following picture and answer the following questions:
- What is rust?
- Write the chemical formula of rust.
- Write the reaction of oxidation of iron at the anode.
- Write the reaction of oxidation of iron at the cathode.
- What is corrosion?
_______ is an alloy made from iron, carbon and chromium.
Find the odd one out and give its explanation.
Which among the following alloys contain mercury as one of its constituents?
Give an example of a chemical reaction for each of the following situations:
Sound is produced
Explain the chemical reactions in rusting of iron.
Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them?
