a short answer type questions
1. State any two properties of acids and bases
2. Why acids ar bases are sometimes added to sol?
3. What is a neutralization reaction? Give an example,
4. How can a hydrated salt be converted into anhydrous salt? Give an example,
5. Complete the following table by filling the colour of the indicator in the given solution
Blue litmus Red litmus Phenolphthalein Methyl Orange
Hydrochloric acid
Red
Sodium hydroxide
solution
Sodium chloride
solution
blue
Long ang
Answers
Answer:
1. acids
Mineral acids are colourless liquids but sometimes sulphuric acid becomes yellow due to impurities. Some organic acids are white coloured solids.
Soluble in water
Explanation:
base
Bases are colourless except the hydroxides of iron and copper.
Some bases are soluble in water.
3.A neutralization reaction is when an acid and a base react to form water and salt and involves the combination of hydrogen ions and hydroxyl ions to generate water. The neutralization of a strong acid and strong base has a pH equal to 7. Example – 1: When Sodium hydroxide is added to hydrochloric acid. Sodium chloride and water are formed.
2.Soils become acidic when basic elements such as calcium, magnesium, sodium and potassium held by soil colloids are replaced by hydrogen ions. Soils formed under conditions of high annual rainfall are more acidic than are soils formed under more arid conditions.
4.an hydrated salt contains it water of crystallisation . when we heat hydrated salt ,it removes or drives it water molecules and thus formed anhydrous salt without any water of crystallisation