CHEMISTRY IMPORTANT QUESTIONS

2-Mark Important Questions

Question 1: Define molarity and molality with their units.

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Question 2: Explain Henry’s Law with an example.

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Question 3: 120 g of NaOH is dissolved in 2 L of solution. Find the molarity of the solution.

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Question 4: What are colligative properties? Explain with examples.

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Question 5: What is molar mass?

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Question 6: What is specific conductance?

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Question 7: State Ohm’s Law.

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Question 8: What is a ligand?

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Question 9: What is a chelate?

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Question 10: Write the IUPAC names of the following coordination compounds:

1. K₃[Fe(CN)₆]

2. K₂[PdCl₄]

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Question 11: Write the differences between DNA and RNA.

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Question 12: Define essential and non-essential amino acids.

4-Mark Important Questions

Question 1: Explain the following reactions:
(a) Sandmeyer reaction
(b) Hinsberg reaction
(c) Wurtz-Fittig reaction
(d) Friedel-Crafts reaction

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Question 2: What is a solvolysis reaction? Write the rule related to it known as Setzoff’s Rule.

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Question 3: Write the formula and unit of specific conductance, equivalent conductance, and molar conductance. Explain the effect of dilution on each of them.

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Question 4: Explain Kohlrausch’s Law along with its statement.
Using the following data, calculate the molar conductance of NH₄OH at infinite dilution:

Λ⁰ₘ (NH₄Cl) = 129.0 S·cm²·mol⁻¹
Λ⁰ₘ (NaOH) = 248.0 S·cm²·mol⁻¹
Λ⁰ₘ (NaCl) = 126.0 S·cm²·mol⁻¹

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Question 5: What is a Standard Hydrogen Electrode (SHE)? How is it made? Write its two limitations.

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Question 6: What is corrosion? Explain the factors affecting corrosion and the methods to prevent it.

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Question 7: Explain the following—
(a) Lucas reagent
(b) Semmler–Wolff reaction
(c) Tollen’s reagent
(d) Urease
(e) Cannizzaro reaction