Advertisements
Advertisements
प्रश्न
Heshna and Keerthi are friends. Keerthi’s teeth are white without caries, but Heshna has teeth with caries. Why? How is it formed?
Advertisements
उत्तर
- Caries are caused by the action of acids on the enamel surface.
- The acid is produced when sugar in foods or drinks reacts with bacteria present on the tooth surface.
- Heshna has not cleaned her teeth well after sipping sugary drinks and snacking.
- She has to brush after meals and before bed.
APPEARS IN
संबंधित प्रश्न
Write a balanced chemical equation for the reaction of sodium hydroxide solution with iron (III) chloride solution
When a piece of limestone reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then a white precipitate Y is formed. On passing excess of gas X, the white precipitate dissolves forming a soluble compound Z.
- What are X, Y and Z?
- Write equations for the reactions which take place:
- When limestone reacts with dilute HCl.
- When gas X reacts with lime water to form white precipitate Y.
- When excess of gas X dissolves white precipitate Y to form a soluble compound Z.
Name the acid present in vinegar.
What is the difference between an alkali and a metal hydroxide?
Write balanced equation to satisfy the following statement:
\[\ce{Acid + Carbonate or bicarbonate -> Salt + water + Carbon dioxide}\]
Give the name and formula of two : Volatile acids
If iron reacts with dilute sulphuric acid, what will be the products?
Write the important uses of hydrochloric acid and sulphuric acids.
Hydrochloric Acid reacts with metal bicarbonates to give ______.
Complete the following equation.
HCl + H2O → ______ + ______.
