- i. Filtration
- ii. Sorting
- iii. Evaporation
- iv. Decantation
Handpicking separates visible solid components by sorting them manually on the basis of differences such as size, colour or shape.
(ii) Sorting
- i. Oil from water
- ii. Sand from water
- iii. Cream from milk
- iv. Oxygen from air
Churning is used to separate butter or cream from curd or milk.
(iii) Cream from milk
- i. Apparatus size
- ii. Presence of air
- iii. Pore size
- iv. Temperature of the mixture
Filtration works because the pores of the filter allow smaller particles or liquid to pass through while retaining larger insoluble particles.
(iii) Pore size
Evaporation under the Sun leaves salt behind. Handpicking is suitable when one visible component is present in smaller quantity. Threshing is for separating grains from stalks. Decantation can separate immiscible liquids or a settled mixture. Sieving separates dry solids of different particle sizes, not flour mixed with water.
(i) True. (ii) True. (iii) False. A mixture of puffed rice and rice grains can be separated by handpicking or by winnowing, depending on the difference in size and weight. Threshing separates grains from stalks. (iv) True. (v) False. Rice flour and water can be separated by filtration or sedimentation followed by decantation, not by ordinary sieving.
Sieving separates dry solids of different particle sizes. Filtration separates insoluble solids from liquids. Handpicking separates visible solid pieces. Magnetic separation removes magnetic material. Decantation separates immiscible liquids such as oil and water.
(i) Gram flour mixed with black gram - (d) Sieving; (ii) Chalk powder mixed with water - (e) Filtration; (iii) Corn mixed with potatoes - (a) Handpicking; (iv) Iron powder mixed with sawdust - (b) Magnetic separation; (v) Oil mixed with water - (c) Decantation.
Decantation depends on sedimentation. Filtration is needed when fine insoluble particles remain suspended and do not settle easily.
Use decantation when the solid is insoluble, heavier than the liquid, and settles at the bottom after standing. Then the clear liquid can be poured off carefully. It is useful when the particles are large or heavy enough to settle and filtration is not necessary.
This is similar to filtration, where a filter allows air to pass but holds back some solid particles.
Yes. Nasal hair works like a natural filter. It traps dust and larger particles from the air before the air goes deeper into the respiratory system.
Like a filter, a mask lets air pass through but blocks many larger droplets and particles.
Masks are generally made of cloth or non-woven fabric. Their role is to act as filters that reduce the spread of droplets, dust and some disease-causing particles between people.
The procedure uses different properties: size for handpicking potatoes, solubility for dissolving salt, insolubility of sawdust for filtration/skimming, and evaporation to obtain salt from salt solution.
First, remove the potatoes by handpicking because they are large and visible. Next, add water to the remaining salt and sawdust mixture. Salt dissolves in water, while sawdust remains insoluble and mostly floats. Separate the sawdust by filtration or careful skimming. Finally, evaporate the salt solution to recover salt.
The story describes making pond water safer by allowing mud to settle, filtering through cloth, boiling to kill germs, cooling, and filtering again before drinking.
The correct options are: thirsty, water, unfit, filtered, muslin cloth, boiled, cooling, filtered, fit. A suitable title is 'Leela Makes Muddy Water Safe'.