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CBSE Class 12-science Answered

Why toluene is more reactive than nitro benzene? 
Asked by afiaorpi01 | 22 Mar, 2019, 01:19: AM
answered-by-expert Expert Answer
In nitrobenzene deactivating group -NO2  is present. It reduces the electron density of benzene group making it less prone to attack by an electrophile.
 
On the other hand, in toluene ring activating group -CH3 is present which activates ring resulting in increased reactivity for electrophilic addition.
 
Thus nitrobenzene reacts less readily with electrophilic reagents as compared to toluene.
Answered by Ramandeep | 22 Mar, 2019, 05:07: PM

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CBSE 12-science - Chemistry
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Asked by pk8238083 | 26 Dec, 2023, 03:59: 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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CBSE 12-science - Chemistry
pls explain
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Asked by mufeedatvp2000 | 15 Apr, 2020, 01:35: PM
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CBSE 12-science - Chemistry
Conversion of amines   
Asked by Sudamkalgunde624 | 31 Dec, 2019, 11:38: AM
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CBSE 12-science - Chemistry
What is the product of this amide acylation?
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Asked by prakriti12oct | 19 Nov, 2019, 12:39: PM
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CBSE 12-science - Chemistry
Please answer this question.
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Asked by dineshchem108 | 19 Jun, 2019, 09:19: PM
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CBSE 12-science - Chemistry
Why toluene is more reactive than nitro benzene? 
Asked by afiaorpi01 | 22 Mar, 2019, 01:19: AM
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CBSE 12-science - Chemistry
Question 6. Option 2nd and 3rd
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Asked by abhitailor158 | 07 Mar, 2019, 04:44: PM
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CBSE 12-science - Chemistry
  Image not present Z is :- (1) CH3—CH2—OH (2) CH3—NH2 (3) CH3—OH (4) CH3—CH2—NH2
Asked by Atulcaald | 16 May, 2018, 02:44: PM
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