OPSC OAS 2020 PrelimsScience & TechnologyQuestion 15
Solved previous year question from the OPSC OAS/OCS 2020 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
In ballpoint pens, dyes used are:
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Answer & Explanation
Correct answer: (B) Alcohol based or (D) Oil based (OPSC accepted more than one option)
- Ballpoint pens use ink that is typically oil based or alcohol based depending on the type and manufacturer. The ink used in ballpoint pens is thicker and more viscous compared to other types of pens, which allows it to adhere to the ball mechanism and transfer smoothly onto paper.
