Question:

Match List I with List II
List I: (A) Oil preservative, (B) Water soluble preservative, (C) Organic solvent preservative, (D) Chemically modified wood
List II: (I) Hardi proof, (II) Acetic anhydride, (III) Solignum, (IV) ASCU, (V) Zinc sulphate
Choose the correct answer from the options given below:

Show Hint

ASCU is always water-soluble. Acetylation (Acetic anhydride) is a high-tech "modification," not just a surface preservative. Solignum is synonymous with heavy oil-based protection.
  • A-IV, B-I, C-III, D-II
  • A-III, B-IV, C-I, D-II
  • A-II, B-V, C-IV, D-III
  • A-II, B-III, C-V, D-I
Show Solution
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The Correct Option is B

Solution and Explanation

Step 1: Understanding the Question:
This question involves matching wood preservation treatments and modification techniques with their specific chemical or brand names.
Detailed Explanation:

Oil preservative: Creosote and its various commercial formulations like Solignum (III) are classic oil-based wood preservatives used for outdoor timber.

Water soluble preservative: ASCU (IV) (a combination of Copper, Arsenic, and Chromium) is the most famous water-borne preservative used in India.

Organic solvent preservative: Hardi proof (I) is an example of a preservative where the toxic chemical is dissolved in an organic solvent like mineral spirits.

Chemically modified wood: Wood acetylation using Acetic anhydride (II) is a process that modifies the wood cell wall polymers to improve durability and dimensional stability.

Step 2: Final Answer:

The correct matching is: A-III, B-IV, C-I, D-II.
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