Practice free Halkoarenes & Haloarenes (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which of the following is an organometallic compound?
The NCERT defines organometallic compounds as 'compounds containing carbon-metal bonds'. $CH_3MgBr$ (a Grignard reagent) has a carbon-magnesium bond, making it an organometallic compound.
Victor Grignard originally switched to chemistry to find an efficient catalyst for:
The NCERT biographical note states, 'While attempting to find an efficient catalyst for the process of methylation, he noted that Zn in diethyl ether had been used for this purpose and wondered whether the Mg/ether combination might be successful.'
A student wants to synthesize toluene from bromobenzene and methyl bromide using a sodium metal in dry ether. What is this reaction known as?
The synthesis of toluene from bromobenzene (an aryl halide) and methyl bromide (an alkyl halide) using sodium in dry ether fits the description of the Wurtz-Fittig reaction: 'A mixture of an alkyl halide and aryl halide gives an alkylarene when treated with sodium in dry ether and is called Wurtz-Fittig reaction.'
If diphenyl is desired as a product through a coupling reaction using sodium in dry ether, which type of halide would be the most suitable reactant?
Diphenyl consists of two phenyl groups joined together. This outcome is characteristic of the Fittig reaction, which uses 'Aryl halides also give analogous compounds when treated with sodium in dry ether, in which two aryl groups are joined together. It is called Fittig reaction.'
Which of the following polyhalogen compounds is explicitly mentioned for its industrial application in the provided text?
The text states: 'A number of polyhalogen compounds e.g., dichloromethane, chloroform, iodoform, carbon tetrachloride, freon and DDT have many industrial applications.'
The deficiency of which hormone, containing iodine, causes a disease called goiter?
The text mentions: 'Our body produces iodine containing hormone, thyroxine, the deficiency of which causes a disease called goiter.'
What is the primary concern associated with some polyhalogen compounds like Freon and DDT, as highlighted in the provided text?
The text states: '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 medical applications is mentioned for synthetic halogen compounds like chloroquine?
The text states: 'Synthetic halogen compounds, viz. chloroquine is used for the treatment of malaria; halothane is used as an anaesthetic during surgery.'
Chloramphenicol, a chlorine-containing antibiotic, is produced by microorganisms and is effective for treating which disease?
The text mentions: 'Chlorine containing antibiotic, chloramphenicol, produced by microorganisms is very effective for the treatment of typhoid fever.'
Haloalkanes are classified as polyhalogen compounds if they contain:
The text states: 'These 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.'
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