TS EAMCET · Chemistry · Surface Chemistry
Which one of the following is used in the hardening of leather?
- A Light sensitive silver bromide in gelatin
- B Sodium lauryl sulphate
- C Alum
- D Tannin
Answer & Solution
Correct Answer
(D) Tannin
Step-by-step Solution
Detailed explanation
Animal leather is colloidal in nature and has positively charged particles. When it is soaked in tannin, a negatively charged colloid, it results in mutual coagulation and gets harden. Thus, leather get hardened after tanning.
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