Discussion
Assertion (A): Borax and boric acid give flame retardancy but are not durable to washing.
Reason (R): They are water soluble salts with no attachment to the fibre.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the cause. Borax and boric acid are effective and cheap flame retardants but they are simply deposited on the fibre, with no covalent bond and no insolubility to hold them, so the first wash removes them. They are therefore used on disposable and non-launderable goods, while durable flame retardancy needs a reactive phosphorus finish or an inherently flame resistant fibre.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development