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Ask QuestionPosted by Jasleen Kour 5 years, 8 months ago
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Posted by Mrunal Khobragade 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Uses Of Polythene
- Polythene having lower density have the ability to deform without breaking and better gives elongation with stretching up to six times the length before breaking.
- It is a useful plastic for molding and extruding in various shapes such as bottle, sheets and pipes etc.
- It is used for plastic bags, stretch films because of its clear and crystalline nature.
- Life expectancy of these on outside condition is found to be 25 years but degrades from ultraviolet radiation.
- Polythene have greater chemical resistance which covers a wide ranges of chemicals.
Posted by Akriti Joshi 5 years, 8 months ago
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Sneha Dhake 5 years, 8 months ago
Tannu Sharma 5 years, 8 months ago
Amit Jangra 5 years, 8 months ago
Posted by Akriti Joshi 5 years, 8 months ago
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Sakshi Chauhan 5 years, 8 months ago
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Sneha Dhake 5 years, 8 months ago
Posted by Moshim Kapoor 5 years, 8 months ago
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Kaustubh Dutt Rai 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Column chromatography is a technique used to separate different components of a mixture. It is a very useful technique used for the purification of elements available in minute quantities. It is also used to remove the impurities that are not very different in chemical properties from the element to be purified
Posted by Pratibha Sahu◝(⑅•ᴗ•⑅)◜..°♡ 5 years, 8 months ago
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Ayush Vishwakarma?? 5 years, 8 months ago
Posted by Nihit Moolaney 5 years, 8 months ago
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Posted by Nihit Moolaney 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Unsaturated compounds decolourisebromine. Benzene has no double bonds, however benzene has a ring of delocalised electrons for that reasonbenzene is less reactive.
Posted by Nihit Moolaney 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
Yes, there is no doubt that benzene is highly unsaturated but despite of this feature it does not gives addition reaction because in benzene ring the double bonds are present at every C atom due to dislocation of pi electrons . As a result of which C-H bond becomes strong which can not be broken easily.
Posted by Praditpa Kumar 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
In p-nitrophenol there is intermolecular hydrogen bonding whereas in o-nitrophenol there is intramolecular hydrogen bonding; as intermolecular hydrogen bonding is stronger, the electron density in the hydrogen attached to the oxygen is pulled by the oxygen of another molecule and hence that hydrogen becomes more acidic (note that if a hydrogen attached to a molecule is more acidic the molecule is said to be more acidic)
Posted by Praditpa Kumar 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
In p-nitrophenol there is intermolecular hydrogen bonding whereas in o-nitrophenol there is intramolecular hydrogen bonding; as intermolecular hydrogen bonding is stronger, the electron density in the hydrogen attached to the oxygen is pulled by the oxygen of another molecule and hence that hydrogen becomes more acidic (note that if a hydrogen attached to a molecule is more acidic the molecule is said to be more acidic)
Posted by Srishty Sidana 5 years, 8 months ago
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Meghna Thapar 5 years, 8 months ago
Henry's law states that at a constant temperature, the amount of a gas that dissolves in a liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid. It was formulated by William Henry in 1803.
Henry's Law can be expressed as a simple equation: Concentration of a gas in liquid phase = A constant × Partial pressure of that gas in the gas phase , or, for convenience, C liq = K × P gas. The constant, K, is referred to herein as the Henry's Law constant and is a unique characteristic of every gas.
Posted by Barkha Jaiswal 5 years, 8 months ago
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Satyam S 5 years, 8 months ago
Posted by Neeru Ahuja 5 years, 8 months ago
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Meghna Thapar 5 years, 8 months ago
From 1st Law of Thermodynamics:
Delta(Internal Energy) = Heat +,- Work
Given that the System is isolated implies no Work is Done in the System or By the System: W=0; It is Given that Int Energy =0.
Q=0.
For the Definition of Entropy:
S= Q/T; Heat / Temperature……… 0/T=0
Therefore there is no Entropy Change in an isolated System where the internal Energy= 0.
Posted by Sonu Sharma 5 years, 8 months ago
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