Nowadays, it has an important role in the human diet. 39.
Metal X and metal Y together form an alloy Z. What are anti-oxidants? (a) What do you think substance X is likely to be? Sulfuric acid and sodium hydroxide? Usually, table salt contains the addition of potassium iodide.
Questions Based on Higher Order Thinking Skills (HOTS).
In general, that is what happens when you mix lead nitrate with potassium iodide.
The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y.
An example of an easy endothermic reaction is dissolving potassium chloride (sold as a salt substitute) in your hand with water.
The copper gets deposited over the nail as the copper sulphate solution becomes iron sulfate solution and colour changes from blue to green.
What is its function? 27. (a) Give one example of a chemical reaction.
Here is an example for that kind of reaction. This is responsible for the respiration reaction in which glucose burns in oxygen to produce heat energy and thus an exothermic reaction.
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal.
The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound.
36. When hydrogen burns in oxygen, water is formed and when water is electrolysed, then hydrogen and oxygen are produced. it'll be a yellow precipitate, it is insoluble in water and in most solution. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Is It Gonna Be Harmful? (c) Silver chloride (AgCl) is the compound Y formed which is the white precipitate formed from the reaction of silver nitrate and sodium chloride.
Metal X is red-brown in colour which does not react with dilute acids at all. 50. (f) What is gas F?
Rancidity is the term used to indicate the development of unpleasant smell and taste in fat and oil containing food due to aerial oxidation and it can be prevented by closely and tight packing of food items in a container which does not allows air to react.
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The compound Y2O is a liquid at room temperature which can turn anhydrous copper sulphate blue. (d) Name any two salt solutions which on mixing together can produce a precipitate of salt MX. (a) Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen.
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