279 public questions tagged with this topic.
Butan-1-ol (CH₃CH₂CH₂CH₂OH) oxidizes to butanal, which lacks the CH₃CO- or CH₃CH(OH)- structure, giving a negative iodoform test.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
Phenol reacts with NaOH to form sodium phenoxide (C₆H₅ONa) and water, indicating its acidic nature due to the stabilization of the phenoxide ion by resonance.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The iodoform test is positive for CH₃CH(OH)- structures. Propan-1-ol (CH₃CH₂CH₂OH) oxidizes to propanal, which lacks the required group, giving a negative result.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The compound has a 3-carbon chain with -OH groups on carbons 1 and 2, named propane-1,2-diol in IUPAC nomenclature.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
The iodoform test is positive for alcohols with a CH₃CH(OH)- group. Propan-2-ol (CH₃CH(OH)CH₃) oxidizes to acetone, which gives a positive result.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers
1-Bromo-2,2-dimethylpropane is a three-carbon chain (propane) with two methyl groups on C₂ and Br on C₁: CH₂BrC(CH₃)2CH₃ .
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes
C₆H₅CHClCH₃ (1-chloro-1-phenylethane) has Cl on a carbon attached to a benzene ring (benzylic) and two carbons (secondary).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes
A secondary alkyl halide has the halogen on a carbon bonded to two other carbons. CH₃CHClCH₂CH₃ (2-chlorobutane) is secondary.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes
A primary alkyl halide has the halogen attached to a carbon bonded to only one other carbon. CH₃CH₂CH₂Br (1-bromopropane) fits this definition.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes
[Cr(NH₃)4ClBr]+ (octahedral, [Ma₄bc]) has 2 geometrical isomers: cis (Cl and Br adjacent) and trans (Cl and Br opposite).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Geometrical Isomerism in Coordination Compounds
From the spectrochemical series (Cl− < F− < NH₃ < CN−), Cl− is the weakest field ligand, causing the smallest Δt.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
[Ni(CN)4]2− (Ni₂+, d8) with strong field CN− adopts square planar geometry, unlike tetrahedral with weak field ligands.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
