Chemical Analysis
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Questions and Answers

What is the formula to calculate the number of moles of a solute?

  • Normality × No. of liters of the solution
  • Molarity × No. of liters of the solution (correct)
  • Molarity × Molecular mass
  • Strength of the solution ÷ Molecular mass

    • What is the equivalent mass of HSO₄⁻?

  • 49.0 (correct)
  • 32.7
  • 98.0
  • 63.0

    • What is the relationship between molarity and normality in acid-base reactions?

  • Molarity = 2 × Normality
  • Normality = 2 × Molarity
  • Normality = Molarity × Acid/base equivalent (correct)
  • Molarity = Normality

    • What is the formula to calculate the strength of a solution?

    <p>Molarity × Molecular mass</p> Signup and view all the answers

    What is the equivalent mass of CH₃COOH?

    <p>60.0</p> Signup and view all the answers

    What is the equivalent mass of H2SO4 in the reaction 2NaCl + H2SO4 → Na2SO4 + 2HCl?

    <p>49 g</p> Signup and view all the answers

    What is the normality of a solution containing 31.6 g of KMnO4 in 1 litre of solution, considering the reaction in acidic medium?

    <p>1 N</p> Signup and view all the answers

    What is the strength of a solution containing 98 g of H2SO4 in 1 litre of solution, considering the reaction 2NaCl + H2SO4 → 2NaHSO4 + 2HCl?

    <p>98 g/L</p> Signup and view all the answers

    If 2 mole of NaOH reacts with 1 mole of H2SO4, what is the normality of the resulting solution?

    <p>2 N</p> Signup and view all the answers

    What is the relationship between molarity and normality for a solution of acid?

    <p>Normality = n × Molarity</p> Signup and view all the answers

    What is the formula for calculating the number of milli-equivalents of a substance?

    <p>Mass in g × 1000 / Equivalent mass</p> Signup and view all the answers

    If a solution of acid A has a normality of 0.5 N and a volume of 250 mL, and a solution of acid B has a normality of 0.25 N and a volume of 500 mL, what is the relationship between the two solutions?

    <p>Normality of A × volume of A = Normality of B × volume of B</p> Signup and view all the answers

    What is the equivalent mass of a metal hydroxide if the equivalent mass of the metal oxide is 40 and the equivalent mass of the metal is 20?

    <p>40 + 8</p> Signup and view all the answers

    What happens when a solution of calcium hydroxide is reacted with carbon dioxide?

    <p>It turns milky</p> Signup and view all the answers

    What is the relationship between the normality of a solution before and after dilution?

    <p>N1 × V1 = N2 × V2</p> Signup and view all the answers

    What is the characteristic smell of NH₃?

    <p>Ammonical smell</p> Signup and view all the answers

    What is the result of the reaction between NH₃ and HCl?

    <p>NH₄Cl</p> Signup and view all the answers

    What is the result of the reaction between CO₂ and lime water?

    <p>CaCO₃</p> Signup and view all the answers

    What is the colour of the precipitate formed when NH₃ reacts with Nessler's reagent?

    <p>Brown</p> Signup and view all the answers

    What is the result of the reaction between NH₃ and CuSO₄ solution?

    <p>Deep blue colour</p> Signup and view all the answers

    What is the effect of CO₂ on a solution of calcium hydroxide?

    <p>It turns the solution milky</p> Signup and view all the answers

    What is the purpose of using an asbestos fibre instead of a glass rod in a flame test?

    <p>To prevent the presence of sodium in the test</p> Signup and view all the answers

    What is the composition of the transparent bead formed in the borax bead test?

    <p>NaBO + B₂O₃</p> Signup and view all the answers

    What is the advantage of the filter ash test over the cobalt nitrate test?

    <p>It gives better results</p> Signup and view all the answers

    What is the effect of SO₂ on lime water?

    <p>It turns the solution milky</p> Signup and view all the answers

    What is the product of the reaction between ethanol and nitric acid?

    <p>Triethyl borate</p> Signup and view all the answers

    What is the purpose of adding Cu and freshly prepared FeSO4 solution in the ring test?

    <p>To detect the presence of nitrate ions</p> Signup and view all the answers

    What is the result of the reaction between sodium oxalate and sulfuric acid?

    <p>Formation of sodium sulfate, water, and carbon dioxide</p> Signup and view all the answers

    What is the test used to detect the presence of fluoride ions?

    <p>Fluoride test using salt and sulfuric acid</p> Signup and view all the answers

    What is the color of the flame produced by the burning of ethanol in the presence of copper?

    <p>Brown</p> Signup and view all the answers

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