Acids Bases Salts Exemplar — Class 10 Science NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 10 Science chapter "Acids Bases Salts Exemplar" — 5 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 10 Science chapter "Acids Bases Salts Exemplar" — 5 important questions with detailed answers for CBSE boa…
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Key Questions Covered:
- Distinguish between acid and base with one property each.
- Calculate pH of solution with H+ ion concentration 10^-5 mol/L.
- What is salt? Name three salts and write their chemical formulas.
- Write balanced equation for reaction between HCl and NaOH. Identify type of r…
- What is meant by pH? Why is pH important for living organisms?
Solutions Summary:
| Question | Status |
|---|---|
| Distinguish between acid and base with one property each. | ✓ Solved |
| Calculate pH of solution with H+ ion concentration 10^-5 … | ✓ Solved |
| What is salt? Name three salts and write their chemical f… | ✓ Solved |
| Write balanced equation for reaction between HCl and NaOH… | ✓ Solved |
| What is meant by pH? Why is pH important for living organ… | ✓ Solved |
Showing 5 of 5 questions
Q1: Distinguish between acid and base with one property each.
Acid: sour taste, turns blue litmus red, pH < 7, example HCl. Base: bitter taste, turns red litmus blue, pH > 7, example NaOH. Acid + Base → Salt + Water (neutralization).
Q2: Calculate pH of solution with H+ ion concentration 10^-5 mol/L.
pH = -log[H+] = -log(10^-5) = 5. The solution is acidic (pH < 7).
Q3: What is salt? Name three salts and write their chemical formulas.
Salt is ionic compound formed by neutralization of acid and base. Examples: (1) Sodium chloride NaCl, (2) Potassium nitrate KNO3, (3) Calcium sulfate CaSO4.
Q4: Write balanced equation for reaction between HCl and NaOH. Identify type of reaction.
HCl + NaOH → NaCl + H2O. This is neutralization reaction (acid-base reaction). H+ + OH- → H2O. It is also exothermic (heat is released).
Q5: What is meant by pH? Why is pH important for living organisms?
pH is measure of acidity or alkalinity of solution. pH = -log[H+]. Scale 0-14: <7 acidic, 7 neutral, >7 basic. Important because: enzymes work at specific pH, blood pH must be 7.35-7.45 for life, soil pH affects plant growth, stomach needs pH 1.5-3.5 for digestion.
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