Question

please answer fast 1 t0 11​

Answer 1

1. Soapy to touch

2. Yellow

3. $\rm Mg(OH)_2$

4. Zn

5. $\rm CO_2$

6. $\rm CH_3COOH$

7. Basic

8. pH < 7

9. white precipitate of calcium carbonate

10. $\rm OH^-$

11. Sodium zincate and hydrogen gas

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Acid :

• The substance that is sour to taste and turns blue litmus to red is called acid.
• Its pH is less than 7 .
• It releases $\rm H^+$ ions when dissolved in water .
• Lesser the pH , stronger the acid .

Base :

• The substance that is bitter in taste and turns red litmus to blue is called base . It is soapy in touch .
• Its pH is greater than 7.
• It releases $\rm OH^-$ ions when dissolved in water .
• Greater the pH , stronger the base .

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Answer 2

Explanation:

1. soapy to touch
2. yellow
3. NH4OH
4. zn
5. co2
6. ch3cooh
7. basic
8. pH<7
9. white precipitate of calcium carbonate
10. OH-
11. sodium zincate and hydrogen gas