Asked in PMC Practice Test 10 (2021) 2021Moderate

Alcohol having 5% water is called as _ ?

Correct answer: C. Rectified spirit

  • A. Absolute alcohol
  • B. Methylated alcohol
  • C. Rectified spirit
  • D. Pure spirit

Explanation

Option A: Absolute alcohol, also known as anhydrous alcohol, is a form of alcohol that is completely pure and does not contain any water. It typically has a concentration of 100% alcohol (ethanol) and is commonly used in scientific and industrial applications where water-free alcohol is required. Option B: Methylated alcohol, also known as denatured alcohol, is ethanol that has been rendered unfit for consumption by the addition of substances like methanol or denatonium. This is done to make the alcohol undrinkable, discouraging its misuse. Methylated alcohol is often used in industrial processes, as a solvent, and in the production of various products such as paints and cleaning agents. Option C: Rectified spirit is an alcohol that has undergone a process of purification to remove impurities, including water. It is typically obtained through multiple distillation processes to achieve a high alcohol content. While rectified spirit is not completely free of water, it usually has a high alcohol concentration, often around 95% or higher. It is commonly used in the production of alcoholic beverages, spirits, and liqueurs. Option D: The term "pure spirit" can be used to refer to different types of alcoholic beverages that have a high alcohol content and minimal or no added substances. Examples of pure spirits include vodka, gin, rum, or whiskey. These spirits are typically produced through distillation to achieve a high alcohol concentration, and while they may have a small amount of water, it is usually at a minimal level compared to other components.

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About Alcohols

Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.

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