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Ask QuestionPosted by Kusum Bhattu 5 years, 5 months ago
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Posted by Sunaina Nazar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
- The chlorofluorocarbon compounds of methane and ethane are jointly called freons.
- They are very stable, non-corrosive, non-toxic, and unreactive liquefiable gases.
- Freon 12 (CCl2F2) is most commonly used Freons in industrial sector.
- Freons are manufactured from tetra chloromethane using Swarts reaction.
- Freons are extensively used in aerosol propellants, refrigerants and air conditioners.
Ayush Mishra 5 years, 5 months ago
Posted by Ankita ?? Arpita☺️ 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Fluorine forms only one oxoacid, HOF due to small atomic size and high electronegativity. Fluorine cannot act as central atom in higher oxoacids.
Posted by Shruti Duddi 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Adsorption is always exothermic. This statement can be explained in two ways.
(i) Adsorption leads to a decrease in the residual forces on the surface of the adsorbent. This causes a decrease in the surface energy of the adsorbent. Therefore, adsorption is always exothermic.
(ii) ΔH of adsorption is always negative. When a gas is adsorbed on a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative.
ΔG = ΔH - TΔS
Since ΔS is negative, ΔH has to be negative to make ΔG negative. Hence, adsorption is always exothermic.
Posted by Sanjana Neware 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
The Schottky defects are more common in ionic compounds with high coordination numbers and where the positive and negative ions are of similar size.
Examples include NaCl, CsCl, KCl, KBr and AgBr. Both Schottky and Frenkel defects are observed in AgBr.
Frenkel defects are observed in ZnS, AgCl, AgBr and AgI.
Posted by Ady Bundela 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
ANSWER : oxygen
A water soluble complex of silver with a dilute aqueous solution of NaCN is sodium argentocyanide. In the cyanide process, the native form is crushed and treated with 0.142% solution of NaCN and aerated.
Argentocyanide is soluble. Further metal is recovered from the complex by reduction with zinc.
Posted by Bhoomi Modi 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
S o l u t i o n is given below :
The rate of reaction depends upon conc., of reactant , surface area of reactant , temperature , presence of light and catalyst .
Posted by Sree Ramana 5 years, 5 months ago
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Shruti Duddi 5 years, 5 months ago
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Posted by Ankita ?? Arpita☺️ 5 years, 5 months ago
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Md Fardeen 5 years, 5 months ago
Posted by Shraddha Kansal 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Step 1 . Treat ethanol with thionyl chloride SOCl2 to get chloroethane
Step 2. Chloroethane when reacted with sdium acetylide forms but- 1-yne ,
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Harsh Israni 5 years, 5 months ago
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Ankita ?? Arpita☺️ 5 years, 5 months ago
Posted by Gaurav Gaikwad 5 years, 5 months ago
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Mishti ???? 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
Frenkel defect is shown by those in which there is large difference in the size of cations and anions. Hence, Frenkel defect is shown by AgCl due to small size of Ag+ ion but not by NaCl because alkali metal ions can not fit into interstital sites.
Posted by Aadarsh Jha 5 years, 5 months ago
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Posted by Shraddha Kansal 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Enantiomers can be defined as one of two different stereoisomers of a compound which is the mirror image of the second stereoisomer of that compound. Enantiomers can be classified as specific types of optical isomers. It is important to note that two enantiomers of a compound must be non-superimposable on each other. Therefore, enantiomers can be alternately defined as optical isomers that are non-superimposable mirror images of each other.
A mixture containing two enantiomers in equal proportions is known as racemic mixture and the process of conversion of enantiomers into a racemic mixture is known as racemisation.
Gaurav Seth 5 years, 5 months ago
Enantiomers:
Enantiomers can be defined as one of two different stereoisomers of a compound which is the mirror image of the second stereoisomer of that compound. Enantiomers can be classified as specific types of optical isomers. It is important to note that two enantiomers of a compound must be non-superimposable on each other. Therefore, enantiomers can be alternately defined as optical isomers that are non-superimposable mirror images of each other. The presence of a single chiral atom (or a structural feature in a compound that results in something similar) can result in the compound as a whole having two different possible structures, each of which are non-superimposable mirror images of each other. Each of these possible structures can be referred to as an ‘enantiomorph’. The structural property of a chemical compound that allows it to have two different possible enantiomorphs is often referred to as enantiomorphism.
Racemisation:
A mixture containing two enantiomers in equal proportions is known as racemic mixture and the process of conversion of enantiomers into a racemic mixture is known as racemisation.
Posted by Devil ? 5 years, 5 months ago
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Prateeth N 5 years, 5 months ago
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