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प्रश्न
Give reasons for the following observations: Leather gets hardened after tanning.
उत्तर
Animal skin (hide) is colloidal in nature and has positively charged particles, whereas tanning consists of negatively charged colloidal particles. When a hide is soaked in tanning, mutual coagulation takes place and as a result, leather gets hardened.
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संबंधित प्रश्न
Give reasons for the following observations:
Brownian movement provides stability to the colloidal solution.
Out of BaCl2 and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.
Explain what is observed An electrolyte, NaCl is added to hydrated ferric oxide sol.
Explain the terms Tyndall effect.
What happens when a lyophilic sol is added to a lyophobic sol?
(i) Lyophobic sol is protected.
(ii) Lyophilic sol is protected.
(iii) Film of lyophilic sol is formed over lyophobic sol.
(iv) Film of lyophobic sol is formed over lyophilic sol.
Give reason for the following:
Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions.
What is Gold number?
Gold number is associated with:-
The right option for the statement “Tyndall effect is exhibited by”, is ______.
Which of the following is a correct statement?
