Advertisements
Advertisements
प्रश्न
How does tooth enamel get damaged? What should be done to prevent it?
उत्तर
Substances like chocolates and sweets are degraded by bacteria present in our mouths. When the pH falls to 5.5, tooth decay starts. Tooth enamel is the hardest substance in our body, and it gets corroded. The saliva produced by salivary glands is slightly alkaline; it helps to increase the pH to some extent, but tooth paste, which contains basic substances, is used to neutralize excess acid in the mouth.
APPEARS IN
संबंधित प्रश्न
Distinguish between a common acid base indicator and a universal indicator.
Choose the correct answer from the options given below:
Which colour with the universal indicator indicates highly alkaline solution?
What can you say about the pH of a solution that liberates carbon dioxide from sodium carbonate?
Solution P has a pH of 13, solution Q has a pH of 6, and a solution R has a pH of 2.
Which solution: Will liberate ammonia from ammonium sulphate on heating?
Write the approximate colour of the following sample with the universal indicator: Soil containing slaked lime
A solution has a pH of 7. Explain how you would increase its pH .
Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2.
Which solution is a strong acid?
Solution P has a pH of 13, solution Q has a pH of 6 and solution R has a pH of 2.
Which solution contains molecules as well as ions?
State the change noticed when blue litmus and red litmus is introduced in the following solution:
MgCl2 Solution
M is an element in the form of a powder. M burns in oxygen and the product obtained is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete the following sentence.
If M is a reactive metal, then ______ will be evolved when M reacts with dilute sulphuric acid.
