SEBA Class 10 Science Important Chapter 2 Acids-Bases and Salts Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 10Science Additional Solutions in English and select need one. SEBA Class 10 General Science Additional Notes English Medium Download PDF. SEBA Important Solutions for Class 10 Science.
SEBA Class 10 Science Important Chapter 2 Acids-Bases and Salts
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 10 General Science Additional Question Answer are part of All Subject Solutions. Here we have given SEBA Class 10 Science Important Question Answer English Medium for All Chapters, You can practice these here.
Acids-Bases and Salts
Chapter: 2
| IMPORTANT QUESTION ANSWER |
Q.1. What are acids? How are they produced?
Ans: An acid is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts. Some acids burn or dissolve other substances that they come into contact with.
Q.2. Mention important characteristics of acids.
Ans: Characteristics of acids:
- Acids are sour in taste.
- Acids furnish hydrogen ions in aqueous solution.
- Acid reacts with metal to form hydrogen gas.
- Acid reacts with carbonates and liberates carbon dioxide gas.
- Blue litmus turns red in acid.
Q.3. What are bases? Give the characteristic of bases.
Ans: Base is defined as the chemical compound whose pH value is greater than 7, accepts a proton, neutralizes acid, and turns red litmus to blue. They generally liberate OH– ion on dissociation. Examples include NaOH, NaHCO3, etc.
Following are some Characteristic of bases:
(i) They are bitter in taste.
(ii) They change red litmus to blue.
(iii) They react with acid to form salt and water.
(iv) Bases are soluble in water and known as alkalies.
Q.4. What is vinegar that is used in the kitchen?
Ans: Vinegar is a solution of an acid called acetic acid whose formula is CH₃ COOH.
Q.5. What are indicators? Give example.
Ans: An indicator is a chemical compound that changes its colour in presence of an acid or base. Indicators are generally derived from plant pigments and are mildly acidic or basic in nature.
For example: Litmu, Methyl oranges, phenolphthalein.
Q.6. What is lime water?
Ans: Lime water is the common name for a saturated aqueous solution of calcium hydroxide. Calcium Hydroxide (Ca (OH) 2 ) is sparsely soluble at room temperature in water.
Q.7. State differences between acids and bases.
Ans:
| Acids | Bases |
| (i) Acids are sour to taste. | (i) Bases are bitter to taste. |
| (ii) Acids turns blue litmus to red. | (ii) Bases turns red litmus to blue. |
| (iii) Acid is define as a substance which contains hydrogen ion. | (iii) A base is defined as a substance which contains hydroxyl ion. |
Q.8. Write the name of two natural indicator.
Ans: (i) Litmus.
(ii) Turmeric.
Q.9. What are ol factory indicators? Give examples.
Ans: Indicators help us to identify if a substance is an acid or base.
(i) An olfactory indicator is a substance whose smell changes based on whether it is mixed with an acid or base.
(ii) In the lab, a process called Olfactory Titration is carried out while using olfactory indicators.
For example: Vanilla, onion and clove.
Q.10. Is the distilled water acidic/basic/neutral? How would you verify it?
Ans: Distilled water is neutral in nature. The same can be verified by using red and blue litmus papers. Neither will show a colour change with distilled water. This proves that distilled water is neutral.
Q.11. What is an oxide?
Ans: An oxide is the compound of an element with oxygen.
Q.12. Name four acids and bases. Write their formula.
Ans:
| Acids | Formula |
| (i) Hydrochloric acid. | (i) Hcl |
| (ii) Sulphuric acid. | (ii) H₂SO₄ |
| (iii) Acetic acid. | (iii) CH₃ COOH |
| (iv) Nitric acid . | (iv) HNO₃ |
| Bases | Formula |
| (i) Sodium Hydroxide. | (i) NaOH |
| (ii) Calcium Hydroxide. | (ii) Ca(OHH)₂ |
| (iii) Ammonium Hydroxide. | (iii) NH₄OH |
| (iv) Magnesium Hydroxide. | (iv) Mg(OH)₂ |
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