Practice free Halkoarenes & Haloarenes (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
What is the common name of $CH_2Cl_2$?
According to Table 6.1 in the NCERT text, the common name for $CH_2Cl_2$ is 'Methylene chloride'.
Which of the following is an example of a benzylic halide?
The NCERT text defines benzylic halides as 'compounds in which the halogen atom is bonded to an sp3-hybridised carbon atom attached to an aromatic ring.' From Table 6.1, 'Benzyl chloride' is given as an example with the structure C6H5CH2Cl, where Cl is attached to an $sp^3$ carbon adjacent to the benzene ring.
What is the IUPAC name for (CH3)2CHCH(Cl)CH3?
This structure is 2-Chloro-3-methylbutane. The longest carbon chain is 4 carbons long (butane). The chlorine is on the second carbon, and a methyl group is on the third carbon, following IUPAC rules for naming alkyl halides as halosubstituted hydrocarbons. The example '2-Bromo-3-methylbutane' for (CH3)2CHCHBrCH3 in the text confirms this logic.
Which term classifies compounds based on whether they contain one, two, or more halogen atoms in their structures?
The NCERT text begins the classification by stating: 'Haloalkanes and haloarenes may be classified as mono, di, or polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures.'
Which of the following statements about the common names of alkyl halides is correct?
The NCERT text states: 'The common names of alkyl halides are derived by naming the alkyl group followed by the name of halide.'
What is the IUPAC name for $CH_3CH_2C(CH_3)_2CH_2I$?
The longest carbon chain is 4 carbons (butane). The iodine is on the first carbon, and there are two methyl groups on the second carbon. Thus, following IUPAC rules, it is named 1-Iodo-2,2-dimethylbutane.
Which of the following describes a polyhalogen compound based on the provided classification?
The NCERT text states: 'Haloalkanes and haloarenes may be classified as...polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures.'
Dichloromethane, chloroform, iodoform, and carbon tetrachloride are explicitly mentioned as polyhalogen compounds with what characteristic?
The NCERT text mentions: 'A number of polyhalogen compounds e.g., dichloromethane, chloroform, iodoform, carbon tetrachloride, freon and DDT have many industrial applications.'
What is the primary environmental concern associated with some polyhalogen compounds like freon and DDT as stated in the text?
The NCERT text specifies: 'However, some of these compounds cannot be easily decomposed and even cause depletion of ozone layer and are proving environmental hazards.'
Which of the following synthetic halogen compounds is used for the treatment of malaria?
The NCERT text states: 'Synthetic halogen compounds, viz. chloroquine is used for the treatment of malaria'.
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