323386
Bakelite is obtained from phenol by reacting with:
1 Acetal
2 \(\mathrm{CH}_{3} \mathrm{CHO}\)
3 \(\mathrm{HCHO}\)
4 Chlorobenzene
Explanation:
Bakelite is obtained by the polymerisation of phenol and HCHO. structure of Bakelite given below:
JEE - 2013
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323387
Assertion : Grignard reagents are prepared in ethers but not in benzene. Reason : Grignard reagents are soluble in benzene.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The solubility of Grignard reagents in anhydrous ether is crucial for their reactivity, ensuring a water-free environment, easy preparation, and stable reaction conditions in organic synthesis. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323388
Natalite is a mixture of
1 acetic acid and diethyl ether
2 ethyl bromide and diethyl ether
3 ethyl alcohol and dimethyl ether
4 diethyl ether and ethyl alcohol
Explanation:
Natalite is a trade name for the mixture of diethyl ether and ethyl alcohol. It is used as petrol substitute. It consist of 54 percent alcohol, 45 percent ether and 1 percent trimethylamine.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323389
Assertion : Grignard reagents are alkyl or aryl magnesium halides. Reason : Alcohols can be used as solvent for Grignard reagent.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alcohols are unsuitable solvents for Grignard reagents due to their reactivity, as the acidic hydrogen in alcohols can undergo undesired side reactions with Grignard reagents, leading to hydrocarbon formation and reduced reagent effectiveness. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323390
What is the function of diethyl ether in the preparation of Grignard reagent?
1 To act as a catalyst
2 To act as an inhibitor
3 To provide lone pair of electrons for co- ordination
323386
Bakelite is obtained from phenol by reacting with:
1 Acetal
2 \(\mathrm{CH}_{3} \mathrm{CHO}\)
3 \(\mathrm{HCHO}\)
4 Chlorobenzene
Explanation:
Bakelite is obtained by the polymerisation of phenol and HCHO. structure of Bakelite given below:
JEE - 2013
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323387
Assertion : Grignard reagents are prepared in ethers but not in benzene. Reason : Grignard reagents are soluble in benzene.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The solubility of Grignard reagents in anhydrous ether is crucial for their reactivity, ensuring a water-free environment, easy preparation, and stable reaction conditions in organic synthesis. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323388
Natalite is a mixture of
1 acetic acid and diethyl ether
2 ethyl bromide and diethyl ether
3 ethyl alcohol and dimethyl ether
4 diethyl ether and ethyl alcohol
Explanation:
Natalite is a trade name for the mixture of diethyl ether and ethyl alcohol. It is used as petrol substitute. It consist of 54 percent alcohol, 45 percent ether and 1 percent trimethylamine.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323389
Assertion : Grignard reagents are alkyl or aryl magnesium halides. Reason : Alcohols can be used as solvent for Grignard reagent.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alcohols are unsuitable solvents for Grignard reagents due to their reactivity, as the acidic hydrogen in alcohols can undergo undesired side reactions with Grignard reagents, leading to hydrocarbon formation and reduced reagent effectiveness. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323390
What is the function of diethyl ether in the preparation of Grignard reagent?
1 To act as a catalyst
2 To act as an inhibitor
3 To provide lone pair of electrons for co- ordination
323386
Bakelite is obtained from phenol by reacting with:
1 Acetal
2 \(\mathrm{CH}_{3} \mathrm{CHO}\)
3 \(\mathrm{HCHO}\)
4 Chlorobenzene
Explanation:
Bakelite is obtained by the polymerisation of phenol and HCHO. structure of Bakelite given below:
JEE - 2013
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323387
Assertion : Grignard reagents are prepared in ethers but not in benzene. Reason : Grignard reagents are soluble in benzene.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The solubility of Grignard reagents in anhydrous ether is crucial for their reactivity, ensuring a water-free environment, easy preparation, and stable reaction conditions in organic synthesis. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323388
Natalite is a mixture of
1 acetic acid and diethyl ether
2 ethyl bromide and diethyl ether
3 ethyl alcohol and dimethyl ether
4 diethyl ether and ethyl alcohol
Explanation:
Natalite is a trade name for the mixture of diethyl ether and ethyl alcohol. It is used as petrol substitute. It consist of 54 percent alcohol, 45 percent ether and 1 percent trimethylamine.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323389
Assertion : Grignard reagents are alkyl or aryl magnesium halides. Reason : Alcohols can be used as solvent for Grignard reagent.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alcohols are unsuitable solvents for Grignard reagents due to their reactivity, as the acidic hydrogen in alcohols can undergo undesired side reactions with Grignard reagents, leading to hydrocarbon formation and reduced reagent effectiveness. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323390
What is the function of diethyl ether in the preparation of Grignard reagent?
1 To act as a catalyst
2 To act as an inhibitor
3 To provide lone pair of electrons for co- ordination
323386
Bakelite is obtained from phenol by reacting with:
1 Acetal
2 \(\mathrm{CH}_{3} \mathrm{CHO}\)
3 \(\mathrm{HCHO}\)
4 Chlorobenzene
Explanation:
Bakelite is obtained by the polymerisation of phenol and HCHO. structure of Bakelite given below:
JEE - 2013
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323387
Assertion : Grignard reagents are prepared in ethers but not in benzene. Reason : Grignard reagents are soluble in benzene.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The solubility of Grignard reagents in anhydrous ether is crucial for their reactivity, ensuring a water-free environment, easy preparation, and stable reaction conditions in organic synthesis. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323388
Natalite is a mixture of
1 acetic acid and diethyl ether
2 ethyl bromide and diethyl ether
3 ethyl alcohol and dimethyl ether
4 diethyl ether and ethyl alcohol
Explanation:
Natalite is a trade name for the mixture of diethyl ether and ethyl alcohol. It is used as petrol substitute. It consist of 54 percent alcohol, 45 percent ether and 1 percent trimethylamine.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323389
Assertion : Grignard reagents are alkyl or aryl magnesium halides. Reason : Alcohols can be used as solvent for Grignard reagent.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alcohols are unsuitable solvents for Grignard reagents due to their reactivity, as the acidic hydrogen in alcohols can undergo undesired side reactions with Grignard reagents, leading to hydrocarbon formation and reduced reagent effectiveness. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323390
What is the function of diethyl ether in the preparation of Grignard reagent?
1 To act as a catalyst
2 To act as an inhibitor
3 To provide lone pair of electrons for co- ordination
323386
Bakelite is obtained from phenol by reacting with:
1 Acetal
2 \(\mathrm{CH}_{3} \mathrm{CHO}\)
3 \(\mathrm{HCHO}\)
4 Chlorobenzene
Explanation:
Bakelite is obtained by the polymerisation of phenol and HCHO. structure of Bakelite given below:
JEE - 2013
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323387
Assertion : Grignard reagents are prepared in ethers but not in benzene. Reason : Grignard reagents are soluble in benzene.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
The solubility of Grignard reagents in anhydrous ether is crucial for their reactivity, ensuring a water-free environment, easy preparation, and stable reaction conditions in organic synthesis. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323388
Natalite is a mixture of
1 acetic acid and diethyl ether
2 ethyl bromide and diethyl ether
3 ethyl alcohol and dimethyl ether
4 diethyl ether and ethyl alcohol
Explanation:
Natalite is a trade name for the mixture of diethyl ether and ethyl alcohol. It is used as petrol substitute. It consist of 54 percent alcohol, 45 percent ether and 1 percent trimethylamine.
MHTCET
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323389
Assertion : Grignard reagents are alkyl or aryl magnesium halides. Reason : Alcohols can be used as solvent for Grignard reagent.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alcohols are unsuitable solvents for Grignard reagents due to their reactivity, as the acidic hydrogen in alcohols can undergo undesired side reactions with Grignard reagents, leading to hydrocarbon formation and reduced reagent effectiveness. So the option (3) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323390
What is the function of diethyl ether in the preparation of Grignard reagent?
1 To act as a catalyst
2 To act as an inhibitor
3 To provide lone pair of electrons for co- ordination
