Question

Formalin 40% indicates:

• A. 40 % water, 6 % formaldehyde
• B. 40 % water, 60 % formaldehyde
• C. 60 % water, 40 % formaldehyde
• D. 4 % water, 69 % formaldehyde

Answer 1

The correct option is C 60 % water, 40 % formaldehyde

Formalin $40$% indicates

In $100㎖$ of solution $40㎖$ formaldehyde and $60㎖$ of water i.e., $40$% formaldehyde and $60$% of water.