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Class 12 · Tamil Nadu State Board

Tamil Nadu Class 12 Chemistry Term 2 Unit Test — Samacheer Kalvi

Class 12 Chemistry term 2 unit test covering ionic equilibrium, electrochemistry, surface chemistry, hydroxy compounds, and carbonyl compounds.

Updated 16 May 20262 min read

Coverage

  • Ionic Equilibrium
  • Electrochemistry
  • Surface Chemistry
  • Hydroxy Compounds and Ethers
  • Carbonyl Compounds and Carboxylic Acids

Section A - One Mark

1. Define common ion effect. 2. Write the Nernst equation for a cell reaction involving n electrons. 3. What is Tyndall effect? 4. Name the reagent used in Lucas test. 5. Which compound gives Tollens' test: aldehyde or ketone? 6. Define buffer solution. 7. What is the function of a salt bridge? 8. State Hardy-Schulze rule. 9. Name one use of phenol. 10. What is esterification?

Section B - Short Answer

1. Distinguish specific conductance and molar conductivity. 2. Explain buffer action with one acidic-buffer example. 3. Compare physisorption and chemisorption. 4. Write the reactions used to distinguish aldehydes from ketones. 5. Explain Williamson ether synthesis.

Section C - Long Answer / Problems

1. Calculate cell EMF under non-standard conditions using the Nernst equation. 2. Explain Kohlrausch law and list two applications. 3. Discuss the preparation and reactions of phenol or carboxylic acids with suitable equations.

Correction Checklist

  • Check logarithms and electron count in every electrochemistry numerical.
  • Use balanced equations for organic conversions.
  • In colloid answers, name both the property and the reason behind it.
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