Alcohol, Phenol, Ethers Questions (MHTCET 2024)
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2024
MHTCET
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This is a collection of past paper questions from MHTCET 2024, covering topics related to alcohols, phenols, and ethers in organic chemistry.
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# Exercise 3 (MHTCET CORNER) ## 1 Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide. - Bromobenzene - Phenol - Aniline - Benzyl alcohol ## 2 Which of the following benzylic alcohol is tertiary alcohol? - 1-phenyl ethanol - 2-phenylpropan-2-ol - Phen...
# Exercise 3 (MHTCET CORNER) ## 1 Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide. - Bromobenzene - Phenol - Aniline - Benzyl alcohol ## 2 Which of the following benzylic alcohol is tertiary alcohol? - 1-phenyl ethanol - 2-phenylpropan-2-ol - Phenyl methanol - 1-phenylpropan-2-ol ## 3 Which of the following is not dihydric phenol? - Hydroquinone - a-naphthol - Resorcinol - Catechol ## 4 Which of the following compounds is obtained, when phenol react with bromine water? - 4-bromophenol - 2, 4, 6 - tribromophenol - 2-bromophenol - 3- bromophenol ## 5 Identify A in the following reaction. A + CH<sub>3</sub>MgBr Ether complex → (CH<sub>3</sub>)<sub>3</sub>C - OH - Acetone - Propionaldehyde - Acetaldehyde - Acetyl chloride ## 6 Which among the following is an example of allylic alcohol? - Propane-1, 3-diol - 2-methylbut-3-en-2-ol - Propane-1, 2, 3-triol - 2-phenyl propane-2-ol ## 7 a-butylene when subjected to hydroboration oxidation reaction, yields - iso-butyl alcohol - sec-butyl alcohol - n-butyl alcohol - tert-butyl alcohol ## 8 Identify B in the following reaction. Acetaldoxime → B + H<sub>2</sub>O + ↑ - CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>OH - C<sub>2</sub>H<sub>5</sub>OH - C<sub>2</sub>H<sub>5</sub>CI - C<sub>2</sub>H<sub>5</sub>NH<sub>2</sub> ## 9 Which among the following compounds is used as selective weed killer? - Picric acid - 2, 4-dichlorophenoxy acetic acid - 2, 4, 6-trichlorophenoxy acetic acid - Salol ## 10 Action of hydrogen iodide on anisole gives, - phenol and iodomethane - iodobenzene and methanol - phenol and methanol - iodobenzene and iodomethane ## 11 iso-butylene on hydroboration followed by oxidation with hydrogen peroxide in presence of base yields - n-butyl alcohol - sec-butyl alcohol - tert-butyl alcohol - iso-butyl alcohol ## 12 How many metameric ethers are represented by the molecular formula C<sub>4</sub>H<sub>10</sub>O? - 4 - 3 - 2 - 5 ## 13 The conversion of 2-methylpropan-1-ol to 2-methylpropan-2-ol is - addition reaction - rearrangement reaction - substitution reaction - elimination reaction ## 14 Natalite is a mixture of - acetic acid and diethyl ether - ethyl bromide and diethyl ether - ethyl alcohol and dimethyl ether - diethyl ether and ethyl alcohol ## 15 Carbolic acid is oxidised by acidified sodium dichromate to give - acetone - ethyl methyl ketone - benzoquinone - anthraquinone ## 16 Phenol in presence of sodium hydroxide reacts with chloroform to form salicylaldehyde. The reaction is known as - Kolbe's reaction - Reimer-Tiemann reaction - Stephen reaction - Etard reaction ## 17 Which of the following compounds does not undergo haloform reaction? - CH<sub>3</sub>-CH-CH<sub>3</sub> - CH<sub>3</sub>-C-CH<sub>3</sub> - C<sub>2</sub>H<sub>5</sub>-CH-C<sub>2</sub>H<sub>5</sub> - CH<sub>3</sub>-C-C<sub>2</sub>H<sub>5</sub> ## 18 Which of the following compounds reacts immediately with Lucas reagent? - CH<sub>3</sub>CH<sub>2</sub>OH - CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>OH - CH<sub>3</sub>-CH-CH<sub>3</sub> - CH<sub>3</sub>-C-CH<sub>3</sub> ## 19 Which of the following compound will give positive jodoform test? - iso-propyl alcohol - Propionaldehyde - Ethyl phenyl ketone - Benzyl alcohol ## 20 tert-butyl methyl ether on treatment with hydrogen iodide in cold gives - tert-butyl iodide and methyl iodide - tert-butyl alcohol and methyl alcohol - tert-butyl alcohol and methyl iodide - tert-butyl iodide and methyl alcohol ## 21 iso-propyl methyl ether when treated with cold hydrogen iodide gives - iso-propyl iodide and methyl iodide - iso-propyl alcohol and methyl iodide - iso-propyl alcohol and methyl alcohol - iso-propyl iodide and methyl alcohol ## 22 Which among the following phenolic compound is most acidic in nature? - p-aminophenol - Phenol - m-nitrophenol - p-nitrophenol ## 23 Name the catalyst used in commercial method of preparation of phenol. - Silica - Calcium phosphate - Anhydrous aluminium chloride - Cobalt naphthenate ## 24 Which of the following compounds has highest boiling point? - Propan-1-ol - n-butane - Chloroethane - Propanal ## 25 Reaction of which among the following ethers with HI in cold leads to formation of methyl alcohol? - Ethyl methyl ether - Methyl propyl ether - iso-propyl methyl ether - tert-butyl methyl ether ## 26 Select of the ether among following that yields methanol as one of the products on reaction with cold hydroiodic acid - 1-methoxy butane - 1-methoxy butane-2-methyl propane - 2-methoxy-2-methyl propane - methoxy benzene ## 27 The order of stability of the following tautomeric compound is - I > II > III - III > II > I - II > I > III - II > III > I ## 28 The nature of 2,4,6-trinitrophenol is - neutral - basic - acidic - weak basic ## 29 Which of the following organic compounds could not be dried by anhydrous CaCl<sub>2</sub>? - Ethanol - Benzene - Chloroform - Ethyl acetate ## 30 Which of the following dissolves in ionic solvents? - C<sub>6</sub>H<sub>6</sub> - CH<sub>3</sub>OH - CCl<sub>4</sub> - C<sub>5</sub>H<sub>12</sub> ## 31 Phenol gives characteristic colouration with - iodine solution - bromine water - aqueous FeCl<sub>3</sub> solution - ammonium hydroxide ## 32 1 mole alcohol reacts with Na to give what weight of hydrogen? - 1 g - 2 g - 3 g - 3.5 g ## 33 The correct order of dehydration of alcohols is - 1° > 2° > 3° - 2° > 1° > 3° - 3° > 2° > 1° - 1° > 3° > 2° ## 34 Ethanolic KOH gives - dehalogenation reactions - dehydrogenation reactions - dehydrohalogenation reactions - substitution reactions ## 35 Which of the following compounds is optically active? - Butanal - Butanol - Butan-2-ol - 2-methyl propan-2-ol ## 36 Which alcohol of molecular formula C<sub>4</sub>H<sub>10</sub>O cannot be obtained by the reduction of carbonyl compound? - 2-methyl propan-1-ol - 2-methyl propan-2-ol - butanol - butan-2-ol ## 37 Ether and alcohol are _______ isomers. - chain- - position - functional - not isomers ## 38 The IUPAC name of C-CH-C<sub>2</sub>H<sub>5</sub> is - 4-propoxy pentane - pentyl propyl ether - 2-propoxy pentane - 2-pentoxy propane ## 39 Phenols are more acidic than alcohols because - phenoxide ion is stabilised by resonance - phenols are more soluble in polar solvents - phenoxides ions do not exhibit resonance - alcohols do not lose H atoms at all ## 40 CH<sub>3</sub>-CH-CH-CH<sub>3</sub> is the anhydride of - 1, 2-butane diol - 2, 2-butane diol - 2, 3-butane diol - 1, 1-butane diol ## 41 Which of the following compound is optically active? - 1-butanol - iso-propyl alcohol - Acetaldehyde - 2-butanol ## 42 2, 4, 6-trinitrophenol is - tear gas - picric acid - chloropicrin - All of these ## 43 Dimethyl ether and ethyl alcohol are - metamers - homologues - functional isomers - position isomers ## 44 Tertiary alcohols (3°) having at least four carbon atoms upon drastic oxidation yield carboxylic acid with - one carbon atom less - two carbon atoms less - three carbon atoms less - All of the above ## 45 Which of the following processes is concerned with the formation of ethers? - Wurtz synthesis - Williamson synthesis - Kolbe synthesis - Hofmann synthesis ## 46 Propylene on hydrolysis with sulphuric acid forms - n-propyl alcohol - iso-propyl alcohol - ethyl alcohol - butyl alcohol ## 47 Give IUPAC name of the following compound CH<sub>3</sub>-CH-CH-CH<sub>3 </sub> - 3-methyl-2-butanol - 2-methyl-3-butanol - iso-propanol - None of the above ## 48 Boiling point of alcohol is comparatively higher than that of corresponding alkane due to - intermolecular hydrogen bonding - intramolecular hydrogen bonding - volatile nature - None of the above ## 49 When phenol reacts with chloroform and an alkali like NaOH, the compound formed is salicylaldehyde. If we use pyrene in place of chloroform, the product obtained is - salicylic acid - cyclohexanol - phenolphthalein - 'icylaldehyde ## 50 Which of the following has lowest boiling point? - ,-nitrophenol - o-nitrophenol - m-nitrophenol - Phenol ## 51 Phenol is - carboxylic acid - carbolic acid - aliphatic acid - aromatic carboxylic acid ## 52 Ethoxy ethane with dilute H<sub>2</sub>SO<sub>4</sub> gives - C<sub>2</sub>H<sub>5</sub>OH, CH<sub>3</sub>HSO<sub>4</sub> - C<sub>2</sub>H<sub>5</sub>OH - CH<sub>3</sub>OH, C<sub>2</sub>H<sub>5</sub>HSO<sub>4</sub> - CH<sub>3</sub>OH, C<sub>2</sub>H<sub>4</sub> ## Answer Key | Question | Answer | |---|---| | 1 | c | | 2 | b | | 3 | b | | 4 | b | | 5 | a | | 6 | b | | 7 | c | | 8 | b | | 9 | b | | 10 | a | | 11 | d | | 12 | b | | 13 | b | | 14 | d | | 15 | c | | 16 | b | | 17 | c | | 18 | d | | 19 | a | | 20 | d | | 21 | b | | 22 | d | | 23 | d | | 24 | a | | 25 | d | | 26 | c | | 27 | b | | 28 | c | | 29 | a | | 30 | b | | 31 | c | | 32 | a | | 33 | b | | 34 | c | | 35 | c | | 36 | b | | 37 | c | | 38 | c | | 39 | a | | 40 | c | | 41 | d | | 42 | b | | 43 | c | | 44 | b | | 45 | b | | 46 | b | | 47 | a | | 48 | a | | 49 | a | | 50 | c | | 51 | b | | 52 | b |
