Anil’s sister accidentally added some water to the bottle containing olive oil and she was afraid of scolding. Anil helped his sister and separated the water from olive oil using a bottle as a separating funnel.(a) What is the principle of using and working on separating the funnel?(b) Suggest two separation techniques used to separate liquid mixtures.(c) What value of Anil is seen in the above case?
(a) The principle of using and working of separating funnel is the difference in the densities of two liquids.
(b) Liquid mixtures can be separated by distillation and fractional distillation.
(c) Anil showed the value of helping, caring and responsible behaviour.
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Prasanna wanted to buy deodorant from the shop. While buying a bottle, he felt that it was slightly heavier than the usual deodorant bottle that he purchased every time. He read the weight mentioned on the bottle and told the shopkeeper to weigh the same. He found the bottle was heavy, and on opening the deodorant bottle, he found it half-filled with water. He complained about the matter to the consumer authority.(a) Define density.(b) Apart from water, what is the other substance that some shopkeepers add to the deodorant?(c) What value of Prasanna is reflected in this act?
Fill in the blanks:(a) A colloid is a ______ mixture and its components can be separated by the technique known as ______.(b) Ice, water and water vapor look different and display different ______ properties but they are _____ the same.(c) A mixture of chloroform and water taken in a separating funnel is mixed and left undisturbed for sometime. The upper layer in the separating funnel will be of ______ and the lower layer will be that of ______.(d) A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25K can be separated by the process called ______.(e) When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ______ of light by milk and the phenomenon is called ______. This indicates that milk is a ______ solution.
A is elder to B by 2 years. A’s father F is twice as old as A and B is twice as old as his sister S. If the ages of the father and sister differ by 40 years, find the age of A.
How will you separate a mixture of cooking oil (groundnut oil) and water?
How will you separate a mixture of oil and water?
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