323192
If (dl) or ( ) 2-methyl butanoic acid were esterified by reaction with (dl) or 2-butanol, how many optically active compounds would be present in the final equilibrium reaction mixture?
1 1
2 2
3 3
4 4
Explanation:
Ester consists of two stereoisomers.Chiral centre during whole reaction are not effected,that's why all esters are optical active.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323193
Assertion : tert-Butoxide is a stronger base than or but is a much poorer nucleophile. Reason : A negatively charged ion is always a more powerful nucleophile than its conjugate acid.
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:
Steric hindrance in the tert-butoxide ion, owing to its larger size compared to smaller alkoxide ions, significantly impedes the attack on a carbon atom in nucleophilic substitution reactions. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323194
Assertion : Acidic character of alcohols follows the order primary secondary tertiary. Reason : Acidic character of alcohols is due to the presence of polar group.
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 acidity of alcohols depends on the effect of alkyl groups, making tertiary alcohols less acidic due to stronger electron-releasing effects than primary alcohols. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323195
Assertion : Addition of to phenyl magnesium bromide gives benzene. Reason : is a stronger acid than 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:
Methanol acts an acid and donates its proton to phenyl magnesium bromide which acts as a base and accepts the proton, to produce benzene. Methanol is a stronger acid than benzene as benzene is resonance stabilized. So the option (1) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323196 hydrolyses with of acetyl derivative of polyhydric alcohol. (molecular mass ). Then the number of hydroxyl groups in the alcohol are ____.
1 5
2 2
3 3
4 4
Explanation:
We know that, Where is the amount of alkali, is amount of acetyl derivative, M is the molecular mass of alcohol and n is the number of hydroxyl groups. or or (the alcohol is trihydric.)
323192
If (dl) or ( ) 2-methyl butanoic acid were esterified by reaction with (dl) or 2-butanol, how many optically active compounds would be present in the final equilibrium reaction mixture?
1 1
2 2
3 3
4 4
Explanation:
Ester consists of two stereoisomers.Chiral centre during whole reaction are not effected,that's why all esters are optical active.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323193
Assertion : tert-Butoxide is a stronger base than or but is a much poorer nucleophile. Reason : A negatively charged ion is always a more powerful nucleophile than its conjugate acid.
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:
Steric hindrance in the tert-butoxide ion, owing to its larger size compared to smaller alkoxide ions, significantly impedes the attack on a carbon atom in nucleophilic substitution reactions. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323194
Assertion : Acidic character of alcohols follows the order primary secondary tertiary. Reason : Acidic character of alcohols is due to the presence of polar group.
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 acidity of alcohols depends on the effect of alkyl groups, making tertiary alcohols less acidic due to stronger electron-releasing effects than primary alcohols. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323195
Assertion : Addition of to phenyl magnesium bromide gives benzene. Reason : is a stronger acid than 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:
Methanol acts an acid and donates its proton to phenyl magnesium bromide which acts as a base and accepts the proton, to produce benzene. Methanol is a stronger acid than benzene as benzene is resonance stabilized. So the option (1) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323196 hydrolyses with of acetyl derivative of polyhydric alcohol. (molecular mass ). Then the number of hydroxyl groups in the alcohol are ____.
1 5
2 2
3 3
4 4
Explanation:
We know that, Where is the amount of alkali, is amount of acetyl derivative, M is the molecular mass of alcohol and n is the number of hydroxyl groups. or or (the alcohol is trihydric.)
323192
If (dl) or ( ) 2-methyl butanoic acid were esterified by reaction with (dl) or 2-butanol, how many optically active compounds would be present in the final equilibrium reaction mixture?
1 1
2 2
3 3
4 4
Explanation:
Ester consists of two stereoisomers.Chiral centre during whole reaction are not effected,that's why all esters are optical active.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323193
Assertion : tert-Butoxide is a stronger base than or but is a much poorer nucleophile. Reason : A negatively charged ion is always a more powerful nucleophile than its conjugate acid.
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:
Steric hindrance in the tert-butoxide ion, owing to its larger size compared to smaller alkoxide ions, significantly impedes the attack on a carbon atom in nucleophilic substitution reactions. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323194
Assertion : Acidic character of alcohols follows the order primary secondary tertiary. Reason : Acidic character of alcohols is due to the presence of polar group.
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 acidity of alcohols depends on the effect of alkyl groups, making tertiary alcohols less acidic due to stronger electron-releasing effects than primary alcohols. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323195
Assertion : Addition of to phenyl magnesium bromide gives benzene. Reason : is a stronger acid than 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:
Methanol acts an acid and donates its proton to phenyl magnesium bromide which acts as a base and accepts the proton, to produce benzene. Methanol is a stronger acid than benzene as benzene is resonance stabilized. So the option (1) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323196 hydrolyses with of acetyl derivative of polyhydric alcohol. (molecular mass ). Then the number of hydroxyl groups in the alcohol are ____.
1 5
2 2
3 3
4 4
Explanation:
We know that, Where is the amount of alkali, is amount of acetyl derivative, M is the molecular mass of alcohol and n is the number of hydroxyl groups. or or (the alcohol is trihydric.)
323192
If (dl) or ( ) 2-methyl butanoic acid were esterified by reaction with (dl) or 2-butanol, how many optically active compounds would be present in the final equilibrium reaction mixture?
1 1
2 2
3 3
4 4
Explanation:
Ester consists of two stereoisomers.Chiral centre during whole reaction are not effected,that's why all esters are optical active.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323193
Assertion : tert-Butoxide is a stronger base than or but is a much poorer nucleophile. Reason : A negatively charged ion is always a more powerful nucleophile than its conjugate acid.
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:
Steric hindrance in the tert-butoxide ion, owing to its larger size compared to smaller alkoxide ions, significantly impedes the attack on a carbon atom in nucleophilic substitution reactions. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323194
Assertion : Acidic character of alcohols follows the order primary secondary tertiary. Reason : Acidic character of alcohols is due to the presence of polar group.
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 acidity of alcohols depends on the effect of alkyl groups, making tertiary alcohols less acidic due to stronger electron-releasing effects than primary alcohols. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323195
Assertion : Addition of to phenyl magnesium bromide gives benzene. Reason : is a stronger acid than 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:
Methanol acts an acid and donates its proton to phenyl magnesium bromide which acts as a base and accepts the proton, to produce benzene. Methanol is a stronger acid than benzene as benzene is resonance stabilized. So the option (1) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323196 hydrolyses with of acetyl derivative of polyhydric alcohol. (molecular mass ). Then the number of hydroxyl groups in the alcohol are ____.
1 5
2 2
3 3
4 4
Explanation:
We know that, Where is the amount of alkali, is amount of acetyl derivative, M is the molecular mass of alcohol and n is the number of hydroxyl groups. or or (the alcohol is trihydric.)
323192
If (dl) or ( ) 2-methyl butanoic acid were esterified by reaction with (dl) or 2-butanol, how many optically active compounds would be present in the final equilibrium reaction mixture?
1 1
2 2
3 3
4 4
Explanation:
Ester consists of two stereoisomers.Chiral centre during whole reaction are not effected,that's why all esters are optical active.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323193
Assertion : tert-Butoxide is a stronger base than or but is a much poorer nucleophile. Reason : A negatively charged ion is always a more powerful nucleophile than its conjugate acid.
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:
Steric hindrance in the tert-butoxide ion, owing to its larger size compared to smaller alkoxide ions, significantly impedes the attack on a carbon atom in nucleophilic substitution reactions. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323194
Assertion : Acidic character of alcohols follows the order primary secondary tertiary. Reason : Acidic character of alcohols is due to the presence of polar group.
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 acidity of alcohols depends on the effect of alkyl groups, making tertiary alcohols less acidic due to stronger electron-releasing effects than primary alcohols. So the option (2) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323195
Assertion : Addition of to phenyl magnesium bromide gives benzene. Reason : is a stronger acid than 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:
Methanol acts an acid and donates its proton to phenyl magnesium bromide which acts as a base and accepts the proton, to produce benzene. Methanol is a stronger acid than benzene as benzene is resonance stabilized. So the option (1) is correct.
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323196 hydrolyses with of acetyl derivative of polyhydric alcohol. (molecular mass ). Then the number of hydroxyl groups in the alcohol are ____.
1 5
2 2
3 3
4 4
Explanation:
We know that, Where is the amount of alkali, is amount of acetyl derivative, M is the molecular mass of alcohol and n is the number of hydroxyl groups. or or (the alcohol is trihydric.)