SSC (English Medium) Class 8Maharashtra State Board

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Answer the Following Question. - SSC (English Medium) Class 8 - Science

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Answer the following question.

Explain the difference between acid and alkali.



 Acid  Alkali
Nature of oxides
metal oxides are generally alkaline in nature

non-metal oxides are basic in nature 
Arrhenius Definition substance which when dissolved in water gives hydrogen ion substance which when dissolved in water can accept hydrogen ions
Bronstead Lowry Definition substance which donates a proton substance which accepts a proton
Strength depends on the concentration of the hydronium ions depends on the concentration of the hydroxide ions
 Characteristics (Physical)
  • depend upon the temperature as it can be solid, liquid or in the form of gas
  • have a sour taste
  • solid in nature except ammonia which is gaseous
  • have a bitter taste
  • slippery in touch
Dissociation would release hydrogen ions (H+) when mixed with water would release hydroxide ions(OH-) when mixed with water
pH value less than 7.0 greater than 7.0
Litmus paper blue litmus paper turns red red litmus paper turns blue
Chemical Formula has a chemical formula with H at the beginning of it. For example, HCl (Hydrochloric Acid). There is one exception to this rule, CH3COOH = Acetic Acid (vinegar) has a chemical formula with OH at the end of it. For example, NaOH (Sodium Hydroxide)
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 Balbharati Solution for Balbharati Class 8 Science - General Science (2018 to Current)
Chapter 12: Introduction to Acid and Base
Exercise | Q: 5.1 | Page no. 88
Solution Answer the Following Question. Concept: Concept of Acid.
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