Advertisements
Advertisements
Question
Write any four physical properties of base.
Answer in Brief
Solution
- Bases generally exist in solid state but some bases exist in liquid state also. E.g. Ammonium hydroxide, calcium hydroxide.
- Bases give soapy touch only in aqueous media not in dry nature.
- Bases are bitter in taste.
- Bases are corrosive in nature. When come in contact with the skin frequently they form painful blisters.
- Bases also change the colour of the indicators. Red litmus paper turns blue when . treated with bases. Similarly, they turn methyl orange yellow and phenolphthalein pink.
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
What are the uses of bases?
Alkalis are ____________.
Assertion: Ammonium hydroxide is a weak base.
Reason: Phenolphthalein becomes pink in NH2OH.
Sodium hydrogencarbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved?
- It turns lime water milky
- It extinguishes a burning splinter
- It dissolves in a solution of sodium hydroxide
- It has a pungent odour
The common salt is ______.
Match the following:
| 1. | Sodium chloride | a. | Detergents |
| 2. | Sodium carbonate | b. | Purification of water |
| 3. | Sodium bicarbonate | c. | Taste to food |
| 4. | Potash alum | d. | Antacids |
Assertion: A salt is produced when an acid is neutralized by a base.
Reason: A salt can be acidic, basic, or neutral.
Write the chemical equation for the reaction of bases with metal oxides.
What is Potash alum? Write its formula.
Write notes on the properties of bases.
