{"id":24014,"date":"2021-06-08T10:22:43","date_gmt":"2021-06-08T04:52:43","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=24014"},"modified":"2022-03-02T10:38:26","modified_gmt":"2022-03-02T05:08:26","slug":"ncert-solutions-for-class-6-science-chapter-5","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/ncert-solutions-for-class-6-science-chapter-5\/","title":{"rendered":"NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances"},"content":{"rendered":"

These NCERT Solutions for Class 6 Science<\/a> Chapter 5 Separation of Substances Questions and Answers are prepared by our highly skilled subject experts to help students while preparing for their exams.<\/p>\n

Separation of Substances NCERT Solutions for Class 6 Science Chapter 5<\/h2>\n

Class 6 Science Chapter 5 Separation of Substances Textbook Exercise Questions and Answers<\/h3>\n

Question 1.
\nWhy do we need to separate different components of a mixture? Give two examples.
\nAnswer:
\nAmong different components of mixture there are many substances which are harmful or not useful for us. To remove these harmful or useless components we need to separate them. For example:<\/p>\n

    \n
  1. Tea leaves are separated from liquid with a strainer while preparing tea.<\/li>\n
  2. Grain is separated from stalks, while harvesting.<\/li>\n<\/ol>\n

    Question 2.
    \nWhat is winnowing? Where is it used?
    \nAnswer:
    \nThe process of separating a mixture of light and heavy particles using wind is called winnowing. For example, separating wheat from chaff. Winnowing is used when one components is lighter than the other. The wind blows away chaff while the grain forms separate pile.
    \n\"NCERT<\/p>\n

    Question 3.
    \nHow will you separate husk or dirt particles from a given sample of pulses before cooking?
    \nAnswer:
    \nHusk or dirt particles can be separated by winnowing, being lighter they will fly away from pulses. Dirt particles can also be separated by handpicking.<\/p>\n

    \"NCERT<\/p>\n

    Question 4.
    \nWhat is sieving? Where is it used?
    \nAnswer:
    \nSieving is a process of separation of particles of different sizes using a sieve. Small and fine sieves are used in the kitchen to separate bran and other impurities from flour. The impurities remain on the sieve and the flour passes through. Bigger sieves are used at construction sites to separate pebbles and stones from sand.<\/p>\n

    Question 5.
    \nHow will you separate sand and water from their mixture?
    \nAnswer:
    \nWe separate sand and water by sedimentation and decantation method. First we leave this mixture for some time. After sometime, the sand which is heavier is settled down at the bottom. After that we will pour water into another container and the mixture will be separated.<\/p>\n

    Question 6.
    \nIs it possible to separate sugar mixed with wheat flour? If yes, how will you do it?
    \nAnswer:
    \nIt is possible to separate sugar mixed with wheat flour. The mixture of sugar and wheat flour can be separated by strainer and sugar being bigger in size remains on the strainer. Thus, sugar can be separated from the mixture of sugar and wheat flour.<\/p>\n

    Question 7.
    \nHow would you obtain clear water from a sample of muddy water?
    \nAnswer:
    \nWe can separate clear water from muddy water by filtration process. A filter paper is one such filter that has very fine pores in it. A filter paper folded in the form of a cone is fixed in a funnel. The mixture is then poured on the filter paper. Solid particles in the mixture do not pass through it and remain on the filter.<\/p>\n

    \"NCERT<\/p>\n

    Question 8.
    \nFill in the blanks.
    \na. The method of separating seeds of paddy from its stalks is called ……………..
    \nb. When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from milk is an example of ……………..
    \nc. Salt is obtained from seawater by the process of ……………..
    \nd. Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called ……………..
    \nAnswer:
    \na. threshing
    \nb. filtration
    \nc. evaporation
    \nd. sedimentation and decantation<\/p>\n

    Question 9.
    \nTrue or False?
    \na. A mixture of milk and water can be separated by filtration.
    \nb. A mixture of powdered salt and sugar can be separated by the process of winnowing.
    \nc. Separation of sugar from tea can be done with filtration.
    \nd. Grain and husk can be separated with the process of decantation.
    \nAnswer:
    \na. False
    \nb. False
    \nc. False
    \nd. False<\/p>\n

    Question 10.
    \nLemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar?
    \nAnswer:
    \nWe should add ice after dissolving sugar. When the temperature is high, then more sugar can be dissolved. After mixing ice, it gets cool and less sugar will dissolve in it.<\/p>\n

    NCERT Extended Learning Activities and Projects<\/span><\/p>\n

    Question 1.
    \nVisit a nearby dairy and report about the processes used to separate cream from milk.
    \nAnswer:
    \nDo it yourself.<\/p>\n

    Question 2.
    \nYou have tried a number of methods to separate impurities like mud from water. Sometimes, the water obtained after employing all these processes could still be a little muddy. Let us see if we can remove even this impurity completely. Take this filtered water in a glass. Tie a thread to a small piece of alum. Suspend the piece of alum in the water and swirl. Did the water become clear? What happened to the mud? This process is called loading. Talk to some elders in your family to find out whether they have seen or used this process.
    \nAnswer:
    \nDo it yourself.<\/p>\n

    Activity 1<\/span><\/p>\n

    Objective: To prepare a saturated salt solution and study the effect of temperature.
    \nMaterials Required: Water, glass, salt, spoon.
    \nProcedure:<\/p>\n