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What is vulcanisation of rubber?...

What is vulcanisation of rubber?

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The process of heating natural rubber with sulphur to a temperature of 373 to 415K `(100^(@)C" to "140^(@)C)` to improve its properties is called vulcanization.
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SUNSTAR PUBLICATION-II PUC CHEMISTRY (SUPPLEMENTARY EXAM QUESTION PAPER JULY - 2014)-PART - D
  1. The vapour pressure of pure benzene at certain temperature is 0.850 ba...

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  2. What happens to the solubility of a gas in a liquid on increasing temp...

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  3. Describe the construction and working of standard hydrogen electrode.

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  4. State Faraday's second law of electrolysis.

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  5. a) The rate of a particular reaction doubles when the temperature chan...

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  6. Write any two differences between order and molecularity of a reaction...

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  7. What is coagulation of a sol? Name two methods by which a lyophobic so...

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  8. What is homogenous catalysis? Give an example.

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  9. Mention the major product formed in the following reaction: i) ii...

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  10. Write equations for the steps in SN^1 mechanism of the conversion of t...

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  11. What is the effect of i) Electron with drawing group on acidity of p...

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  12. Write the general equation of Williamson's ether synthesis

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  13. Write equation for: i) The reaction between Carboxylic acid and PCl(...

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  14. Explain aldol condensation with an example.

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  15. i) CH(3)-CO-NH(2)overset(Br(2)//NaOH)rarr ii) Poverset(NaNO(2), HCl)...

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  16. Explain carbylamine reaction.

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  17. i) What is denaturation of protein? ii) Give an example of acidic am...

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  18. Write the Haworth's structure of -D(+) Glucose.

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  19. Name the monomers used for getting following polymers: i) PVC ii) Ba...

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  20. What is vulcanisation of rubber?

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