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Tooth decay start when the pH of the mou...

Tooth decay start when the pH of the mouth is lower than-

A

6.3

B

7.2

C

8.5

D

5.5

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BEYOND PUBLICATION-ACIDS,BASES AND SALTS-EXERCISE
  1. Suresh's skin has burned while diluting conc.H2SO4. Why is it so ? How...

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  2. In rocky areas, a curdy substance formed when a soap is added to water...

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  3. The reagent used in the preparation of chloroform is

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  4. Bases tum phenophthalein into .................. colour.

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  5. Non-metallic oxides are innature

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  6. In glucose and alcohol solutionare absent.

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  7. To get rid of stomach pain caused by indigestion, people use bases cal...

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  8. Tooth decay start when the pH of the mouth is lower than-

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  9. Which is the formula of washing soda ?

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  10. pH = 0 for a solution. It contains

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  11. HCL, H2SO4,CH3COOH are some acids. Which of the following is not true ...

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  12. Which of the following is correct ?

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  13. CaCO(3)undersetrarr(Delta)CaO + X. CaO+H2O to Y. X+Y to Z. X,Y, Z a...

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  14. Which of the following is not true about pH ?

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  15. NaHCO3 + HCloversetDeltararr naCl + H2O + X.The gas 'X' is passed thro...

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  16. A substance ‘A’ on heating gives a Colourless gas. The residue is diss...

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  17. Which type of bases allow electrcity through them ?

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  18. Some bases do not allow electricity through them. Why ?

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  19. Yet sodium ethaoxide is a salt, it has basic nature. Why ?

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  20. When a soap added to water, white curdy substance will form why ?

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