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प्रश्न
Stainless steel is very useful material for our life. In stainless steel, iron is mixed with
विकल्प
Ni and Cr
Cu and Cr
Ni and Cu
Cu and Au
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उत्तर
Ni and Cr
Explanation -
Stainless steel is an alloy of iron made by mixing different metals like about 11% of chromium, nickel, molybdenum and niobium etc. and carbon with a maximum concentration of about 1.2%.
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संबंधित प्रश्न
Give two examples of amphoteric oxides.
What are amphoteric oxides?
Give reason:
Sodium, potassium and lithium are stored under oil.
Diamond : electric insulator : : _______ : electric conductor
Which of the following oxide(s) of iron would be obtained on the prolonged reaction of iron with steam?
Example of an amphoteric oxide is:
Which of the following metals liberate hydrogen with 5% HNO3?
(i) Cu
(ii) Zn
(iii) Mn
(iv) Mg
Which one of the following metals does not react with cold as well as hot water?
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?
Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?
Answer the questions based on the figure below:
- Which experiment setup is demonstrated in the figure?
- What do you conclude after the reactions? Name reaction.
Answer the questions based on the figure below:
- Which reaction is shown in the figure?
- Which gas is evolved in the reaction?
- Give an example of reactants that rapidly show this reaction. Give equations.
- Give an example of reactants that do not react rapidly.
- In what condition will reactants of (c) part react? Give equation.
Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are:
- MgO
- ZnO
- Al2O3
- Cao
Write a chemical equation showing the ionic products formed on dissolving potassium hydroxide in water.
On adding dilute sulphuric acid to a test tube containing a metal ‘X’, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents the metal ‘X’?
