Question

3. What is an alkali?
4. Name the hardest substance in the human body.​

Answer 1

Explanation:

1). Alkali is a basic hydroxide or ionic salt which is soluble in water. All bases are not alkali. ... Let us study through this article about alkali, its properties, uses and about alkaline solution.

4)Tooth enamel

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Answer 2

3. a compound with particular chemical properties including turning litmus blue and neutralizing or effervescing with acids.

4. Tooth enamel

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