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Questions and Answers
What are resins?
What are resins?
- Fluid substances obtained from plants through a process of coagulation
- Solid or semisolid, amorphous products derived from living natural sources and most are plants products (correct)
- Water-soluble mixtures of polysaccharides obtained from plants
- Elastic or non-elastic substances derived from natural sources
What is the characteristic of resins on heating?
What is the characteristic of resins on heating?
- They become elastic and stretchable
- They soften and finally melt (correct)
- They become water-soluble
- They turn into rubber-like substances
What is the solubility characteristic of resins?
What is the solubility characteristic of resins?
- Soluble in water and petroleum spirit, but insoluble in alcohol, chloroform, and ether
- Insoluble in water, alcohol, chloroform, and ether, but soluble in petroleum spirit
- Soluble in water, alcohol, chloroform, ether, and petroleum spirit
- Insoluble in water and usually insoluble in petroleum spirit, but dissolve more or less completely in alcohol, chloroform, and ether (correct)
What is the main component of rubber latex?
What is the main component of rubber latex?
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What are vegetable gums?
What are vegetable gums?
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