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प्रश्न
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
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उत्तर
- Two metals that react with water: Potassium, sodium
- Two moderately reactive metals: Zinc, iron
- 1. Most highly reactive metal: Potassium
2. Most less reactive metal: Gold
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संबंधित प्रश्न
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.
Write the composition of the alloy called bronze.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name the gas evolved when cinnabar ore is roasted.
Which metal is extracted from bauxite ore?
Zinc blende ore can be converted into zinc oxide by the process of ______.
Give reasons, why aluminum is used in:
making alloys
Give the chemical formula of :
Sodium aluminate
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
Name a non- metal that has a metallic luster and sublimes on heating.
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Define roasting.
Name the process used for the enrichment of sulphide ore.
_______ is the least reactive metal.
Write the name.
The molecular formula of main ore of aluminium -
Explain in brief types of extraction of highly reactive metals according to their reactivity.
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
Care must be taken while diluting concentrated nitric acid with water. Why?
