SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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pure substance
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mixture
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Either A or B
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None of the above
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Detailed explanation-1: -Answer and Explanation: The dissolution of coffee powder in hot water gives a solution of coffee. In this solution, coffee powder is present in small amount and hot water is present in large amount. Therefore, in the coffee solution, solute is coffee powder and solvent is hot water.
Detailed explanation-2: -By the above definition, coffee would qualify as an o/w emulsion composed with an aqueous solution.
Detailed explanation-3: -Instant coffee is made from real coffee beans. The soluble and volatile contents of the beans are extracted. Then the water is removed so powder or concentrated soluble coffee powder are left over. It’s essentially been dehydrated for our convenience – just add water and you have yourself a brew!