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CBSE Class 12-science Answered

thre are so many reactions and conversions in organic chemistry.
Asked by ADITYA KUMAR SINGH | 26 Oct, 2013, 12:00: PM
answered-by-expert Expert Answer
  • The best way to learn the equations is by practicing them. Try to understand a reaction and practice by writing 3 to 4 times. This will help you in remembering different reactions more easily.
  • Learn the functional groups. Study the reactions as per the functional groups.
  • Study all the name reactions in your syllabus and list them down viz, Clemmensen’s reduction, aldol condensate ion, Cannizzaro’s reaction, Wurtz reaction etc.
  • Write down all the reagents used in various chemical reactions. For example: Oxidising agents: Alkaline KMnO4, acidified K2Cr2O7 V2O5 ; Reducing agents: H2/Ni, Cu
  • Take practice tests.
Answered by Hanisha Vyas | 26 Oct, 2013, 09:33: PM

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CBSE 12-science - Chemistry
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Asked by shwetayaligar205 | 07 Jul, 2022, 08:13: PM
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CBSE 12-science - Chemistry
sir/madam, this doubt will be lenghty. request peace reading. the doubt is w.r.t chapter Amines; to be specific it is w.r.t basicity of amines. in the topic of the comparision of the basic character of alkylamines with ammonia,  the order of basicity of amines is tertiary> secondary> primary in gaseous phase, only due to the +I effect. in gasous phase only +I effect is shown? also in the aqueous phase, the disturbancy in the order of basicity is due to the sum of effects of +I effect, solvation effect and steric hindrance? the order of the stability of the following in aqueous phase: +I effect: tertiary> secondary> primary solvation: primary > secondary > tertiary steric hindrance: primary > secondary > tertiary so does it means that +I is effected in both gaseous and aqueous phase but solvation and steric hindrance are effected only in aqueous phase? also sir there is an order of basicity when R= CH3 group and when R= C2H5 group: R= CH3: secondary> primary> tertiary R= C2H5: secondary> tertiary> primary so sir can we generalise the order that: when R=CH3 group, the order of basicity: secondary> primary> tertiary and when R> CH3 group, the order of basicity: secondary> tertiary> primary
Asked by kaziryan.05 | 12 Jul, 2021, 09:51: PM
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CBSE 12-science - Chemistry
sir/ madam, is it true that if no of bonds in an atom increases then the atom acquires a positive charge on it and when it loses one bond it acquires a negative charge on it ? why does it happen so?  
Asked by kaziryan.05 | 06 Jul, 2021, 11:31: PM
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