Chemistry
Choose the role played by alloys given as A, B, C with 1 to 3.
A. Solder
B. Duralumin
C. Stainless steel
It is stronger than aluminium, has light weight and is used in making aircraft frames.
It is lustrous, hard, corrosion resistant and used in surgical instruments.
It lowers the melting point of the alloy and is used for soldering purpose.
Metallurgy
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Answer
- Duralumin
- Stainless steel
- Solder
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(a) Conversion of potassium nitrate to potassium bisulphate.
(b) Conversion of nitrogen and hydrogen to ammonia.
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(a) A catalyst used in the manufacture of nitric acid by Ostwald's process.
(b) A compound formed when both sulphur trioxide and sulphuric acid reacts.
Write the products and balance the equation.
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