Chemistry - Study Mode

[#856] Vinegar made by fermentation from cane sugar contains
Correct Answer

(D) Acetic acid

Explanation

Solution: Vinegar is a liquid substance consisting mainly of acetic acid (CH 3 CO 2 H) and water, the acetic acid being produced through the fermentation of ethanol by acetic acid bacteria. It is today mainly used in the kitchen as a general cooking ingredient, but historically, as the most easily available mild acid, it had a great variety of industrial, medical, and domestic uses, some of which (such as a general household cleanser) are still promoted today. Commercial vinegar is produced either by fast or slow fermentation processes. In general, slow methods are used with traditional vinegars, and fermentation proceeds slowly over the course of weeks or months. The longer fermentation period allows for the accumulation of a nontoxic slime composed of acetic acid bacteria. Fast methods add mother of vinegar (i.e., bacterial culture) to the source liquid before adding air using a venturi pump system or a turbine to promote oxygenation to obtain the fastest fermentation

[#857] Which one of the following is found in Vinegar ?
Correct Answer

(A) Acetic acid

Explanation

Solution: Vinegar is a liquid consisting mainly of acetic acid (CH 3 COOH) and water. The acetic acid is produced by the fermentation of ethanol by acetic acid bacteria. It is mainly used as a cooking ingredient.

[#858] Which of the following is not a derivative of barbituric acid?
Correct Answer

(D) Equanil

Explanation

Solution: Equanil is not a derivative of barbituric acid.

[#859] Which of the following substance's smell is similar to Ethanoic acid?
Correct Answer

(C) Vinegar

Explanation

Solution: Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour taste and pungent smell. Vinegar is roughly 3–9% acetic acid by volume, making acetic acid the main component of vinegar apart from water.

[#860] The strongest acid of the following is
Correct Answer

(C) P-nitrophenol

Explanation

Solution: The strongest acid of the following is P-nitrophenol.