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Home made jams and gellies without any a...

Home made jams and gellies without any added chemical preservative additives spoil in a few days whereas commercial jams and jellies have a long shelf life. Explain. What role does added sodium benzoate play?

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  4. Blood in human body is highly buffered at pH of

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  5. The conjugate base of [Zn(H2O)4]^(2+) is

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  6. For pH > 7 the hydronium ion concentrationWould be

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  7. According to Ostwald's dilution law, the degree of dissociation of wea...

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  8. The relation between pH and pOH is

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  9. pH of a solution is 4. [H^+] is

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  10. The [OH^-] of a solution is 1.0 xx 10^(-10) M. The solution is

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  11. The pH of 3xx10^(-4) M KOH is

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  12. Na2CO3 is a salt of

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  13. The solution of a salt is basic. The salt must be

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  14. In CH3COOH/CH3COONa buffer, the reserve acidity is due to

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  15. The solubility of Pbl2, is related to its solubility product by the eq...

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  16. The solubility product of CaF2 is

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  17. If Na2CO3 is added to the solution of H2CO3, the pH of H2CO3 solution

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  18. Which of the following is least likely to behave as Lewis base?

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  19. A monobasic weak acid solution has a molarity of 0.005 and pH of 5. Wh...

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  20. 0.023g of sodium metal reacted with 100 cm^3 of water. The pH of the r...

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  21. The concentration of hydronium ions in a cup of black coffee is 1.3 xx...

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