Q. Which of the following is used as indelible ink?
A) Aqueous ${CuSO}_{4}$ solution
B) Aqueous ${AgNO}_{3}$ solution
C) Aqueous $NaCl$ solution
D) Aqueous $NaOH$ solution
Explanation
(b)
Aqueous silver nitrate solution is used as indelible ink.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.