What are the properties of acids …

Acids:

• Acids are sour in taste
• The chemical nature of such substances is acidic
• Acid turns blue litmus red
• It gives hydrogen ion when dissolves in water
• Do not give any colour with phenolphthalein indicator
• Do not absorb carbon dioxide gas
• Acids do not react with ammonium salt
• Acids are generally found in Vinegar, Curd, Spinach, lemons, Citrus fruits, Amla, Tamarind, grapes, unripe mangoes, Citrus fruits such as oranges, etc.

Bases:

• Bases are bitter in taste and soapy to touch
• Base turns red litmus blue
• The nature of such substances is said to be basic
• It gives hydroxide ions when dissolves in water
• It give pink colour with phenolphthalein indicator
• Some bases like NaOH absorbs carbon dioxide gas
• Bases are generally found in lime water, soap, window cleaner, Milk of Magnesia
• Reacts with ammonium salt to give ammonia gas