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प्रश्न
Identify who I am!
Ore of Aluminum- ______
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उत्तर
Ore of Aluminum- Bauxite
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संबंधित प्रश्न
Name two metals which are found in nature in the free state.
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Name a reducing agent that may be used to obtain manganese from manganese dioxide.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Name the gas in air which tarnishes silver articles slowly.
Define the term gangue.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Give the principles of the hydrolytic method.
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Compare the process of calcination and roasting.
What is passive iron?
Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Atomic number of aluminium is _______ and its electronic configuration is _______.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
