7. Name an indicator which is pinkin alkaline solution but turns colorlessina
8. What happens when an acid reacts with a metal?
Give chemical equation of the reaction
9. What is neutralization reaction? Give example
10. State same uses of inorganic acid
11. Why do acids not show acidic behavior in the absence of water?
12. Which element is common to all acids?
13. What is the common name of water soluble bases?
14. Fresh milk has a PH of 6. When it changes into curd, will its PH values increase or decrea
15. the Ph values of six solutions A to Fare given below:-
AO, B-11, C-6, D=3, E-13, 5-8.
Answers
Answer:
7- phenolphthalein
8- it gives salt and hydrogen gas
Explanation:
9- A salt is any compound which can be derived from the neutralization of an acid and a base. The word "neutralization" is used because the acid and base properties of H+ and OH- are destroyed or neutralized. In the reaction, H+ and OH- combine to form HOH or H2O or water molecules. A neutralization is a type of double replacement reaction. A salt is the product of an acid-base reaction and is a much broader term then common table salt as shown in the first reaction.
The following are some examples of neutralization reactions to form salts.
a. HCl + NaOH --> NaCl + HOH
b. H2SO4 + 2 NH4OH --> (NH4)2SO4 + 2 HOH
c. 2 NaOH + H2CO3 --> N2CO3 + 2 NaOH
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