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प्रश्न
Complete flow chart given below.
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उत्तर
संबंधित प्रश्न
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
An element has its electron configuration as 2,8,8,2. Now answer the following questions.
a) What is the atomic number of this element?
b) What is the group of this element?
c) To which period does this element belong?
Give the chemical formula of :
Cryolite
Name the following:
Two metals which are found in the free or native state.
How are metals refined by the electrolytic methods?
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Name a non- metal that has a metallic luster and sublimes on heating.
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.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Write the name.
The molecular formula of main ore of aluminium -
Write the name.
Extraction of aluminium from alumina-
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
Electrical wires have a coating of an insulting material. The material, generally used is
