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Priya Dharshini ? 6 years, 11 months ago
Priya Dharshini ? 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Synthetic resins method is a method used for removing permanent hardness of water. In this method ion exchange resins (RSO3H) is changed to RNa by treating it with NaCl. Then, RNa exchanges Na+ ions with Ca2+ and Mg2+ ions present in hard water and as a result, hard water is softened.
2RNa + M2+ → R2M + 2Na+
R2M + 2 NaCl → 2RNa + MCl2
Posted by Dhan Raj 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Homo - latin word meaning man , names assigned to them on their typical characteristics - homo habilis (tool maker) , homo erectus(upright man) , homo sapiens (thinking man) . Extinctiom of early form of australopithecus and replacement by species that were better adapted to drier conditions.
Australopithecus - latin and greek words meaning southern ape
They were earliest form of humans . (Mention about the brain size , posture etc)
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Gaurav Seth 6 years, 11 months ago
Skill describes a type of ability a person has acquired - Riding a bicycle + Drawing + Dancing
He skillfully steered the car out of the crowd.
Technique describes the protocol with which the job / task is executed.
The lock refused to open with the key. The locksmith new the technique so he manipulated the levers with a fine wire to open the lock.
Posted by Sandeep Mandal 6 years, 11 months ago
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