323752
Which reagent distinguish between pentanoic acid and pentanamide?
1 Cold dil. \(\mathrm{NaOH}\)
2 Cold. Dil. \(\mathrm{NaHCO}_{3}\)
3 Cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 All
Explanation:
(1) Amides are hydrolysed by dilute \(\mathrm{NaOH}\) to give \(\mathrm{NH}_{3}\) (2) \(\mathrm{NaHCO}_{3}\) reacts with acids to give \(\mathrm{CO}_{2}(\mathrm{~g})\). (3) Amides are also hydrolysed in acidic conditions.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323753
Assertion : Both formic acid and oxalic acid decolourize \(\mathrm{KMnO}_{4}\) solution Reason : Both are easily oxidised to \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\).
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:
Formic acid \((\mathrm{HCOOH})\) and oxalic acid \(\left(\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{O}_{4}\right)\) decolorize potassium permanganate by acting as reducing agents in an acidic medium, causing the reduction of permanganate ions \(\left(\mathrm{MnO}_{4}^{-}\right)\)to manganese ions \(\left(\mathrm{Mn}^{2+}\right)\) and resulting in decolorization. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323754
Formic acid and acetic acid are distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{FeCl}_{3}\)
3 Victor Meyer's test
4 Tollen's reagent
Explanation:
silver mirror Formic acid(Aldehyde group) \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}\xrightarrow[{{\text{reagent}}}]{{{\text{Tollen's}}}}{\text{Negative test }}\) Absence of aldehyde group
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323755
Phenol and benzoic acid may be distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{NaOH}\)
3 \(\mathrm{Na}\)
4 Both (1) and (3)
Explanation:
Benzoic acid reacts with \(\mathrm{NaHCO}_{3}\) to give effervescence due to the evolution of \(\mathrm{CO}_{2}\). Phenol does not give effervescence. Phenol and benzoic acid cannot be distinguished by \(\mathrm{NaOH}\) and \(\mathrm{Na}\) because both can react with \(\mathrm{NaOH}\) and \(\mathrm{Na}\).
323752
Which reagent distinguish between pentanoic acid and pentanamide?
1 Cold dil. \(\mathrm{NaOH}\)
2 Cold. Dil. \(\mathrm{NaHCO}_{3}\)
3 Cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 All
Explanation:
(1) Amides are hydrolysed by dilute \(\mathrm{NaOH}\) to give \(\mathrm{NH}_{3}\) (2) \(\mathrm{NaHCO}_{3}\) reacts with acids to give \(\mathrm{CO}_{2}(\mathrm{~g})\). (3) Amides are also hydrolysed in acidic conditions.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323753
Assertion : Both formic acid and oxalic acid decolourize \(\mathrm{KMnO}_{4}\) solution Reason : Both are easily oxidised to \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\).
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:
Formic acid \((\mathrm{HCOOH})\) and oxalic acid \(\left(\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{O}_{4}\right)\) decolorize potassium permanganate by acting as reducing agents in an acidic medium, causing the reduction of permanganate ions \(\left(\mathrm{MnO}_{4}^{-}\right)\)to manganese ions \(\left(\mathrm{Mn}^{2+}\right)\) and resulting in decolorization. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323754
Formic acid and acetic acid are distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{FeCl}_{3}\)
3 Victor Meyer's test
4 Tollen's reagent
Explanation:
silver mirror Formic acid(Aldehyde group) \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}\xrightarrow[{{\text{reagent}}}]{{{\text{Tollen's}}}}{\text{Negative test }}\) Absence of aldehyde group
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323755
Phenol and benzoic acid may be distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{NaOH}\)
3 \(\mathrm{Na}\)
4 Both (1) and (3)
Explanation:
Benzoic acid reacts with \(\mathrm{NaHCO}_{3}\) to give effervescence due to the evolution of \(\mathrm{CO}_{2}\). Phenol does not give effervescence. Phenol and benzoic acid cannot be distinguished by \(\mathrm{NaOH}\) and \(\mathrm{Na}\) because both can react with \(\mathrm{NaOH}\) and \(\mathrm{Na}\).
323752
Which reagent distinguish between pentanoic acid and pentanamide?
1 Cold dil. \(\mathrm{NaOH}\)
2 Cold. Dil. \(\mathrm{NaHCO}_{3}\)
3 Cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 All
Explanation:
(1) Amides are hydrolysed by dilute \(\mathrm{NaOH}\) to give \(\mathrm{NH}_{3}\) (2) \(\mathrm{NaHCO}_{3}\) reacts with acids to give \(\mathrm{CO}_{2}(\mathrm{~g})\). (3) Amides are also hydrolysed in acidic conditions.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323753
Assertion : Both formic acid and oxalic acid decolourize \(\mathrm{KMnO}_{4}\) solution Reason : Both are easily oxidised to \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\).
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:
Formic acid \((\mathrm{HCOOH})\) and oxalic acid \(\left(\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{O}_{4}\right)\) decolorize potassium permanganate by acting as reducing agents in an acidic medium, causing the reduction of permanganate ions \(\left(\mathrm{MnO}_{4}^{-}\right)\)to manganese ions \(\left(\mathrm{Mn}^{2+}\right)\) and resulting in decolorization. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323754
Formic acid and acetic acid are distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{FeCl}_{3}\)
3 Victor Meyer's test
4 Tollen's reagent
Explanation:
silver mirror Formic acid(Aldehyde group) \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}\xrightarrow[{{\text{reagent}}}]{{{\text{Tollen's}}}}{\text{Negative test }}\) Absence of aldehyde group
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323755
Phenol and benzoic acid may be distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{NaOH}\)
3 \(\mathrm{Na}\)
4 Both (1) and (3)
Explanation:
Benzoic acid reacts with \(\mathrm{NaHCO}_{3}\) to give effervescence due to the evolution of \(\mathrm{CO}_{2}\). Phenol does not give effervescence. Phenol and benzoic acid cannot be distinguished by \(\mathrm{NaOH}\) and \(\mathrm{Na}\) because both can react with \(\mathrm{NaOH}\) and \(\mathrm{Na}\).
323752
Which reagent distinguish between pentanoic acid and pentanamide?
1 Cold dil. \(\mathrm{NaOH}\)
2 Cold. Dil. \(\mathrm{NaHCO}_{3}\)
3 Cold conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\)
4 All
Explanation:
(1) Amides are hydrolysed by dilute \(\mathrm{NaOH}\) to give \(\mathrm{NH}_{3}\) (2) \(\mathrm{NaHCO}_{3}\) reacts with acids to give \(\mathrm{CO}_{2}(\mathrm{~g})\). (3) Amides are also hydrolysed in acidic conditions.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323753
Assertion : Both formic acid and oxalic acid decolourize \(\mathrm{KMnO}_{4}\) solution Reason : Both are easily oxidised to \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\).
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:
Formic acid \((\mathrm{HCOOH})\) and oxalic acid \(\left(\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{O}_{4}\right)\) decolorize potassium permanganate by acting as reducing agents in an acidic medium, causing the reduction of permanganate ions \(\left(\mathrm{MnO}_{4}^{-}\right)\)to manganese ions \(\left(\mathrm{Mn}^{2+}\right)\) and resulting in decolorization. So the option (1) is correct.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323754
Formic acid and acetic acid are distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{FeCl}_{3}\)
3 Victor Meyer's test
4 Tollen's reagent
Explanation:
silver mirror Formic acid(Aldehyde group) \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COOH}}\xrightarrow[{{\text{reagent}}}]{{{\text{Tollen's}}}}{\text{Negative test }}\) Absence of aldehyde group
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323755
Phenol and benzoic acid may be distinguished by
1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{NaOH}\)
3 \(\mathrm{Na}\)
4 Both (1) and (3)
Explanation:
Benzoic acid reacts with \(\mathrm{NaHCO}_{3}\) to give effervescence due to the evolution of \(\mathrm{CO}_{2}\). Phenol does not give effervescence. Phenol and benzoic acid cannot be distinguished by \(\mathrm{NaOH}\) and \(\mathrm{Na}\) because both can react with \(\mathrm{NaOH}\) and \(\mathrm{Na}\).
