Class 12th Chemistry 2017 Set3 Outside Delhi Board Paper Solution
Following are the transition metal ions of 3d series:
Ti4+ , V2+ , Mn3+ , Cr3+
(Atomic numbers : Ti = 22 , V = 23, Mn = 25, Cr = 24)
Answer the following:
1 Which ion is most stable in an aqueous solution and why?
2. Which ion is a strong oxidising agent and why?
3. Which ion is colourless and why?
1. Ti4+ = 3d° , V2+ = 3d3 , Mn3+ = 3d4 , Cr3+ = 3d3
out of these ions Cr3+ is most stable due to cystal feild spliting concept. In Cr3+ , t2g in half filled, so extra stable.
2. Mn3+ is strong oxidising agent because Mn3+ can easily be converted into Mn2+ having d5 configuration which is stable half-filled configuration.
.3. Ti4+ is colourless because it is having no unpaired e- for excitation to higher energy level and it is colourless.
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(iii) 1-Bromopropane to 2-bromopropane
(iv) Toluene to benzyl alcohol
(v) Benzene to 4-bromonitrobenzene
(vi) Benzyl alcohol to 2-phenylethanoic acid
(vii) Ethanol to propanenitrile
(viii) Aniline to chlorobenzene
(ix) 2-Chlorobutane to 3, 4-dimethylhexane
(x) 2-Methyl-1-propene to 2-chloro-2-methylpropane
(xi) Ethyl chloride to propanoic acid
(xii) But-1-ene to n-butyliodide
(xiii) 2-Chloropropane to 1-propanol
(xiv) Isopropyl alcohol to iodoform
(xv) Chlorobenzene to p-nitrophenol
(xvi) 2-Bromopropane to 1-bromopropane
(xvii) Chloroethane to butane
(xviii) Benzene to diphenyl
(xix) tert-Butyl bromide to isobutyl bromide
(xx) Aniline to phenylisocyanide
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(vi) Benzaldehyde and Acetophenone
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Draw figure to show the splitting of d orbitals in an octahedral crystal field.
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Name the following halides according to IUPAC system and classify them as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:
(i) (CH3)2CHCH(Cl)CH3
(ii) CH3CH2CH(CH3)CH(C2H5)Cl
(iii) CH3CH2C(CH3)2CH2I
(iv) (CH3)3CCH2CH(Br)C6H5
(v) CH3CH(CH3)CH(Br)CH3
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(viii) CH3CH=C(Cl)CH2CH(CH3)2
(ix) CH3CH=CHC(Br)(CH3)2
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How the following conversions can be carried out?
(i) Propene to propan-1-ol
(ii) Ethanol to but-1-yne
(iii) 1-Bromopropane to 2-bromopropane
(iv) Toluene to benzyl alcohol
(v) Benzene to 4-bromonitrobenzene
(vi) Benzyl alcohol to 2-phenylethanoic acid
(vii) Ethanol to propanenitrile
(viii) Aniline to chlorobenzene
(ix) 2-Chlorobutane to 3, 4-dimethylhexane
(x) 2-Methyl-1-propene to 2-chloro-2-methylpropane
(xi) Ethyl chloride to propanoic acid
(xii) But-1-ene to n-butyliodide
(xiii) 2-Chloropropane to 1-propanol
(xiv) Isopropyl alcohol to iodoform
(xv) Chlorobenzene to p-nitrophenol
(xvi) 2-Bromopropane to 1-bromopropane
(xvii) Chloroethane to butane
(xviii) Benzene to diphenyl
(xix) tert-Butyl bromide to isobutyl bromide
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How will you bring about the following conversions?
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(iv) Toluene to benzyl alcohol
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