Given below are two statements:
Statement I: Propene on treatment with diborane gives an addition product with the formula
Statement II: Oxidation of with hydrogen peroxide in presence of NaOH gives propan-2-ol.
In the light of the above statements, choose the most appropriate answer from the options given below: [2024]
Statement I is correct but Statement II is incorrect.
Statement I is incorrect but Statement II is correct.
Both Statement I and Statement II are correct.
Both Statement I and Statement II are incorrect.
(2)
Diborane reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
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Hence, statement I is incorrect but statement II is correct.
Identify D in the following sequence of reactions. [2024]
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-Propyl alcohol
Isopropyl alcohol
Propanal
Propionic acid
(1)
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Which one of the following alcohols reacts instantaneously with Lucas reagent? [2024]
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(4)
Tertiary (3°) alcohols react immediately with Lucas reagent.
Identify 'X' in above reactions. [2023]
(1)
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Consider the following reaction and identify the product (P). [2023]
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(3)
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Which amongst the following will be most readily dehydrated under acidic conditions? [2023]
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Given below are two statements :
Statement-I: The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group.
Statement-II: o-Nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring.
In the light of the above statements, choose the most appropriate answer from the options given below: [2022]
Both statement-I and statement-II are correct.
Both statement-I and statement-II are incorrect.
Statement-I is correct but statement-II is incorrect.
Statement-I is incorrect but statement-II is correct.
(3)
Electron withdrawing groups (e.g. ) stabilise the phenoxide ion more by dispersing the negative charge relative to phenol (i.e. release of proton becomes easy) and thus, increase the acidic strength of phenols. The particular effect is more when the substituent is present on o- and p- positions than in m- position to the phenolic group. Thus, acidic strength of nitrophenols decreases in the order:
p-nitrophenol > o-nitrophenol > m-nitrophenol > phenol.
Given below are two statements :
Statement I : In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl + anhydrous , known as Lucas Reagent.
Statement II : Primary alcohols are most reactive and immediately produced turbidity at room temperature on reaction with Lucas Reagent.
In the light of the above statements, choose the most appropriate answer from the options given below: [2022]
Both statement I and statement II are correct.
Both statement I and statement II are incorrect.
Statement I is correct but statement II is incorrect.
Statement I is incorrect but statement II is correct.
(3)
Tertiary alcohols are most reactive and immediately produce turbidity at room temperature while primary alcohols do not react with Lucas reagent at room temperature.
Reaction between acetone and methyl magnesium chloride followed by hydrolysis will give [2020]
iso-propyl alcohol
sec-butyl alcohol
tert-butyl alcohol
iso-butyl alcohol
(3)
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The structure of intermediate A in the following reaction is [2019]
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(3)
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