(1) Write an account of reaction of metals with water by giving suitable chemical equations.
(2) Why is Sodium kept immersed in kerosene oil?
(3) Explain anodising.
Answers
Answer:
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Explanation:
(1)Water-reactive substances[1] are those that spontaneously undergo a chemical reaction with water, as they are highly reducing in nature.[2] Notable examples include alkali metals, sodium through caesium, and alkaline earth metals, magnesium through barium.
Some water-reactive substances are also pyrophoric, like organometallics and sulphuric acid, and should be kept away from moisture. The use of acid-resistant gloves and face shield are required and should be handled in fumehoods.[3]
Water-reactive substances are classified as R2 under the UN classification system and as Hazard 4.3 by the United States Department of Transportation.
(2) because it is high reactive in air and it react easily in air
(3)Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. ... Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium