Organic Chemistry Reaction Test :-
This test is very simple and Easy for one who remember the intermediate,reagents, products that formed in organic chemistry Reaction mechanisms
Questions and Answers
- 1.
Cannizaro reaction takes place in ?
- A.
Acetaldehyde
- B.
Charcoal
- C.
Acetone
- D.
Formaldehyde
Correct Answer
D. FormaldehydeExplanation
The Cannizaro reaction is a redox reaction that occurs in formaldehyde. It involves the oxidation of one molecule of formaldehyde to formic acid and the reduction of another molecule of formaldehyde to yield methanol. This reaction is typically catalyzed by a strong base, such as hydroxide ion. The reaction does not occur in acetaldehyde, charcoal, or acetone.Rate this question:
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- 2.
The process done in Wittig reaction is?
- A.
Olefination
- B.
Methylation
- C.
Hydrolysis
- D.
Redox reaction
Correct Answer
A. OlefinationExplanation
The process done in Wittig reaction is olefination. The Wittig reaction involves the formation of a carbon-carbon double bond (olefin) through the reaction between a phosphonium ylide and a carbonyl compound. This reaction is widely used in organic synthesis to selectively introduce double bonds into molecules.Rate this question:
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- 3.
The intermediate involved in Reimer-Tiemann Reaction is
- A.
Carbene
- B.
Carbocation
- C.
Carbanion
- D.
Nitronium ion
Correct Answer
A. CarbeneExplanation
In the Reimer-Tiemann Reaction, the intermediate involved is a carbene. A carbene is a molecule that contains a carbon atom with only two bonds and an unshared pair of electrons. This intermediate is formed when a chloroform molecule reacts with a strong base, such as hydroxide ion. The carbene then reacts with an aromatic compound, resulting in the formation of a new carbon-carbon bond. This reaction is commonly used to introduce a formyl group (-CHO) into aromatic compounds.Rate this question:
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- 4.
The product formed in Wolff-Kishner Reduction ?
- A.
Sugar
- B.
Alkane
- C.
Ester
- D.
Amides
Correct Answer
B. AlkaneExplanation
In Wolff-Kishner reduction, a carbonyl compound is converted into an alkane. This reaction involves the use of hydrazine (N2H4) and a strong base, such as KOH or NaOH, to generate a hydrazone intermediate. The hydrazone is then treated with a strong base and heated, causing the carbon-nitrogen double bond to break and resulting in the formation of an alkane. Therefore, the correct answer is Alkane.Rate this question:
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- 5.
The reagent used in Clemmensen Reduction is ?
- A.
Sucrose/Ethanol
- B.
LiAlH4
- C.
Zinc - Amalgam (Zn-Hg)
- D.
None of the above
Correct Answer
C. Zinc - Amalgam (Zn-Hg)Explanation
The correct answer is Zinc - Amalgam (Zn-Hg). Clemmensen Reduction is a chemical reaction used to convert carbonyl compounds, such as ketones and aldehydes, into their corresponding alkanes. In this reaction, zinc is combined with mercury to form a zinc amalgam, which acts as the reducing agent. The amalgam reduces the carbonyl group to an alkyl group, resulting in the formation of an alkane. Sucrose/Ethanol and LiAlH4 are not reagents used in Clemmensen Reduction.Rate this question:
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- 6.
The reducing agent used in Birch Reduction is ?
- A.
Liq.NH3 / Na
- B.
LiAlH4
- C.
KMnO4
- D.
Starch
Correct Answer
A. Liq.NH3 / NaExplanation
The reducing agent used in Birch Reduction is liquid ammonia (Liq.NH3) combined with sodium (Na). This combination creates a strong reducing environment, allowing for the reduction of certain organic compounds. LiAlH4 is a common reducing agent, but it is not used in Birch Reduction. KMnO4 is an oxidizing agent, not a reducing agent. Starch is not a reducing agent and is not involved in the Birch Reduction process.Rate this question:
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- 7.
The Reagent used in wittig reaction is
- A.
Acetaldehyde
- B.
Hydrazine
- C.
Phosphorus
- D.
Phosphorus Ylide
Correct Answer
D. pHospHorus YlideExplanation
Phosphorus ylide is the correct answer for the reagent used in the Wittig reaction. The Wittig reaction is a chemical reaction that involves the formation of a carbon-carbon double bond using a phosphorus ylide and a carbonyl compound. Phosphorus ylides are compounds that contain a positively charged phosphorus atom and a negatively charged carbon atom. They are capable of reacting with carbonyl compounds to form an alkene product. Therefore, in the context of the Wittig reaction, phosphorus ylide is the reagent that is used.Rate this question:
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- 8.
Wolff- Kishner Reagent is
- A.
Hydrazine
- B.
Zn-Hg
- C.
KMnO4
- D.
Barium Chloride
Correct Answer
A. HydrazineExplanation
The correct answer is Hydrazine. Hydrazine is a powerful reducing agent commonly used in the Wolff-Kishner reduction reaction. This reaction is used to convert carbonyl compounds, such as ketones and aldehydes, into their corresponding hydrocarbons. Hydrazine reacts with the carbonyl compound to form a hydrazone intermediate, which is then treated with a strong base to eliminate nitrogen gas and yield the reduced product. This reaction is widely used in organic synthesis and provides a convenient method for the conversion of carbonyl compounds into saturated hydrocarbons.Rate this question:
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- 9.
Cannizaro reaction can be taking place in
- A.
All aldehydes
- B.
All Sugars
- C.
Aldehyde with No Alpha-Hydrogens
- D.
None of these
Correct Answer
C. Aldehyde with No AlpHa-HydrogensExplanation
The Cannizaro reaction is a redox reaction that involves the oxidation of one aldehyde molecule and the reduction of another aldehyde molecule. It occurs in aldehydes with no alpha-hydrogens because these aldehydes cannot undergo aldol condensation, which is a competing reaction. In the absence of alpha-hydrogens, the Cannizaro reaction becomes the predominant reaction pathway for these aldehydes. Therefore, the correct answer is "Aldehyde with No Alpha-Hydrogens."Rate this question:
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- 10.
The acetylsalicylic acid is also known as
- A.
Salicylic acid
- B.
Aspirin
- C.
Phenolic acid
- D.
All the above
Correct Answer
B. AspirinExplanation
Acetylsalicylic acid is commonly known as aspirin. It is a medication used to treat pain, fever, and inflammation. While salicylic acid is a related compound, it is not the same as acetylsalicylic acid. Phenolic acid is a general term for a class of compounds that have a phenol group attached to a carboxylic acid group, but it is not specifically referring to acetylsalicylic acid. Therefore, the correct answer is aspirin.Rate this question:
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Mar 19, 2023Quiz Edited by
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Apr 10, 2020Quiz Created by
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