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प्रश्न
Find the odd one out and give its explanation.
पर्याय
Zinc coating
Tinning
Electroplating
Calcination
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उत्तर
Calcination
Explanation-
Calcination is a process involved in extraction of carbonate ores while others are methods used for prevention of corrosion.
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संबंधित प्रश्न
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Give one word or a phrase:
The process by which sulphide ore is concentrated.
Why does a new aluminium vessel lose shine so soon after use?
Name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula.
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its ______.
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
- Name the metal and write its chemical symbol.
- Write the name and formula of the sulphide ore.
- Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
- Name a common device in which this metal is used.
- Can this metal displace copper from copper sulphate solution? Why?
Give the chemical formula of :
Cryolite
Name the following:
The mixture of materials fed into a furnace to extract a metal.
Name the following:
The substance added to get rid of gangue in the extraction of metal.
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
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Write the molecular formulae of the following compound.
Fluorspar
Explain the concept of Roasting.
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
Explain concept with example/explain with the help of a balanced equation.
Calcination
The poorest conductor of heat among metals is ____________.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
An alloy is
