NCERT Solutions for Class 6 Science Chapter 5
NCERT Solutions for Class 6 Science Chapter 5 Separation of Substances in English Medium or अध्याय 5: पदार्थो का पृथक्करण in हिंदी मीडियम free to download in PDF.
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NCERT Solutions for Class 6 Science Chapter 5
Class: | 6 |
Subject: | Science – विज्ञान |
Chapter 5: | Separation of Substances |
Class 6 Science Chapter 5 Answers
Class 6 Science Chapter 5 in English Medium
Class 6 Science Chapter 5 in Hindi Medium
Class 6 Science Chapter 5 Solutions Related Pages
Important Questions for Practice
1. In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half filled with water. Which method would you use to get back solid copper sulphate from the solution?
(a) Decantation (b) Evaporation (c) Sedimentation (d) Condensation
2. Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take ‘Lassi’ with less fat content. Which of the following methods would be most appropriate for Boojho to prepare it?
(a) Filtration (b) Decantation (c) Churning (d) Winnowing
3. Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed? Which of the following should be Boojho’s answer?
(a) Evaporation of water from the glass.
(b) Water that seeped out from the glass.
(c) Evaporation of atmospheric water vapour.
(d) Condensation of atmospheric water vapour.
4. Four mixtures are given below
(i) Kidney beans and chick peas
(ii) Pulses and rice
(iii) Rice flakes and corn
(iv) Potato wafers and biscuits
5. Which of these can be separated by the method of winnowing?
(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv)
Which of the following mixtures would you be able to separate using the method of filtration?
(a) Oil in water (b) Cornflakes in milk (c) Salt in water (d) Sugar in milk
6. During summer, Boojho carries water in a transparent plastic bottle to his school. One day he left his bottle in the school. The bottle still had some water left in it. The following day, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to
(a) boiling and condensation.
(b) evaporation and saturation.
(c) evaporation and condensation.
(d) condensation and saturation.
Answers of Important Questions
1 (b),
2 (c),
3 (d),
4 (d),
5 (b),
6 (c).
Important Questions on Class 6 Science Chapter 5
For example:
We used to separate slightly larger sized impurities like the pieces of dirt, stone, and husk from wheat, rice or pulses by handpicking method.
Rice or pulses are usually washed before cooking. When we add water to these, the impurities like dust and soil particles get separated.
Sieving is used in flour mills to separate broken particles of grains from flour. It is also used at construction sites to separate lumps, smaller stones from the mixture of sand and cement.
एक कंटेनर में कुछ समय के लिए मिश्रण छोड़ दें।
कंटेनर के तल पर रेत जम जाती है। इसे अवसादन कहते हैं।
पानी को धीरे से एक दूसरे कंटेनर में डालें। इसे निस्तारण कहते हैं।
हम रेत के बारीक कणों को हटाने के लिए फिल्टर पेपर का उपयोग भी कर सकते हैं, जिसे निस्यंदन खाते हैं।
किसी छलनी का प्रयोग करके चालन विधि के माध्यम से आटे के साथ मिश्रित चीनी को अलग किया जा सकता है।
एक कंटेनर में पंकिल जल डालकर कुछ समय के लिए छोड़ देते हैं।
कुछ समय बाद, कंटेनर के नीचे अशुद्धियाँ जमा हो जाती हैं। इस प्रक्रिया को अवसादन कहते हैं।
ऊपरी परत साफ पानी की है। इसे दूसरे कंटेनर में डाल लेते हैं। इस प्रक्रिया को निस्तारण कहते हैं।
महीन अशुद्धियों को दूर करने के लिए इसे फिल्टर पेपर की मदद से फिर से छान लेते हैं। इस प्रक्रिया को निस्यंदन कहते हैं।
ठंडे पानी की तुलना में चीनी गर्म पानी में जल्दी घुल जाती है। हम पानी में बर्फ मिलाने से पहले अधिक चीनी घोल सकते हैं।