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271.
Products of the following reaction CH3C ≡ C. CH2CH3 ... are :
(1)CH3CHO + CH3CH2CHO
(2)CH3COOH + CH3COCH3
(3)CH3COOH + HOOC.CH2CH3
(4)CH3COOH + CO2
272.
Oxidation of toluene to Benzaldehyde can be easily carried out with which of the following reagents?
(1)CrO3/acetic acid, H3O+
(2)CrO3/acetic anhydride, H3O+
(3)KMnO4/HCl, H3O+
(4)CO/HC1, anhydrous A1C13
273.
The formation of cyanohydrin from a ketone is an example of
(1)nucleophilic addition
(2)electrophilic substitution
(3)nucleophilic substitution
(4)electrophilic addition.
274.
Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?.CH3
(1)CH3−C(CH3)2−O−CH3
(2)H3C−CH(CH3)−CH2−O−CH3
(3)CH3−CH2−CH2−O−CH3
(4)H3C−CH2−CH(CH3)−O−CH3
275.
Identify the major product C in the given sequence of reactions.
(1)
(2)
(3)
(4)
276.
A compound ' A ' (C7H8O) is insoluble in NaHCO3 solution but dissolves in NaOH and gives a characteristic colour with neutral FeCl3 solution. When treated with bromine water compound ' A ' forms the compound ' B ' with the formula, C7H5OBr3. A ' is
(1)
(2)
(3)
(4)
277.
Action of hydrogen iodide on anisole gives,
(1)phenol and iodomethane
(2)iodobenzene and methanol
(3)phenol and methanol
(4)iodobenzene and iodomethane.
278.
The products formed in the reaction of cumene with O2 followed by treatment with dil. HCl are :
(1)
(2)
(3)
(4)
279.
The major products formed :
A and B respectively are:
(1)
(2)
(3)
(4)
280.
What is the product obtained when vapours of phenol are passed over heated zinc dust?
(1)Cyclohexane
(2)Benzene
(3)Benzoic acid
(4)Ethene
281.
Identify X and Y from the following X+YH+Aspirin+H3CCOOH
(1)
(2)
(3)
(4)
282.
What is the product of following reaction ? Hex-3-ynal ?
(1)
(2)
(3)
(4)
283.
Amongst the following, the major product of the given chemical reaction is Major Product
(1)
(2)
(3)
(4)
284.
The correct sequence of steps involved in the mechanism of Cannizzaro's reaction is
(1)nucleophilic attack, transfer of H−and transfer of H+.
(2)transfer of H−, transfer of H+and nucleophilic attack.
(3)transfer of H+, nucleophilic attack and transfer of H−.
(4)electrophilic attack by OH−, transfer of H+and transfer of H−.
285.
The product ' A ' gives white precipitate when treated with bromine water. The product ' B ' is treated with barium hydroxide to give the product ' C '. The compound ' C ' is heated strongly to form product ' D '. 'The product ' D ' is
(1)4-methylpent-3-en-2-one
(2)but-2-enal
(3)3-methylpent-3-en-2-one
(4)2-methylbut-2-enal.
286.
In the reaction, R−X→alcoholicKCNA→diluteHClBthe product B is
(1)alkyl chloride
(2)aldehyde
(3)carboxylic acid
(4)ketone.
287.
The maior product [B] in the following reactions is
→HeatHI[A]alcohol→ΔH2SO4[B]
(1)CH3−CH2−CH=CH−CH3
(2)CH3−CH2−C(CH3)=CH2
(3)CH3−CH=C(CH3)−CH3
(4)CH2=CH2
288.
The reaction involved in the oil of winter green test is Salicylic acid ΔConc. H2SO4 Product The product is treated with Na2CO3 solution. The missing reagent in the above reaction is
(1)NaOH
(2)ethanol
(3)methanol
(4)phenol.
289.
Identify A in the given reaction SOCl2 ‘A’ (Major Product)
(1)
(2)
(3)
(4)
290.
When 3,3‐dimethyl‐2‐butanol is heated with H2SO4, the maior product obtained is
(1)2,3‐dimethyl‐2‐butene
(2)cis and trans isomers of 2,3‐dimethyl‐ 2‐butene
(3)2,3‐dimethyl‐l‐butene
(4)3,3‐dimethyl‐1‐butene.
291.
Major products A and B formed in the following reaction sequence, are [NEET 2024]
(1)
(2)
(3)
(4)
292.
The major product of the following reaction, if it occurs by SN2 mechanism is :
(1)
(2)
(3)
(4)
293.
Identify the major product A and B for the below given reaction sequence.
(1)
(2)
(3)
(4)
294.
Anisole reacts with HI to form
(1)phenol and iodomethane
(2)iodobenzene and methanol
(3)phenol and methanol
(4)iodobenzene and iodomethane.
295.
Consider the above chemical reaction. Product "A " is
(1)
(2)
(3)
(4)
296.
When enthanol is heated with cone. H2SO4, a gas is produced. The compound formed, when this gas is treated with cold dilute aqueous solution of Baeyer's reagent, is :
(1)Formaldehyde
(2)Formic acid
(3)Glycol
(4)Ethanoic acid
297.
Identify compound (Z) in the following reaction sequence.
(1)
(2)
(3)
(4)
298.
Which among the following compounds is a primary alcohol?
(1)2-Methylpropan-1-ol
(2)Butan-2-ol
(3)2-Methylpropan-2-ol
(4)Cyclobutanol
299.
Ethanoic acid undergoes Hell-VolhardZelinsky reaction but methanoic acid does not because of
(1)absence of α−H atom in ethanoic acid
(2)higher acidic strength of ethanoic acid than methanoic acid
(3)presence of α−H atom in methanoic acid
(4)presence of α−H atom in ethanoic acid.
300.
Identify the product A obtained in the following reaction. phenol + Conc. nitric acid →conc.H2SO4A
