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February 2020 Chemistry Board Question Paper
14 Questions
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February 2020 Chemistry Board Question Paper

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@HalcyonFriendship

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Questions and Answers

Which of the following is a synthetic polymer?

  • Silk
  • Linen
  • Jute
  • Terylene (correct)
  • Which of the following hydrides is NOT a reducing agent?

  • H2Te
  • H2S
  • H2Se
  • H2O (correct)
  • During oxidation of ferrous sulphate using a mixture of dilute sulphuric acid and potassium permanganate solution, the colour changes from

  • Red to brown (correct)
  • Red to colorless
  • Violet to colorless
  • Pink to green
  • Metals are benefitted by increased temperature. Which of the following is false regarding it?

    <p>Metals become more brittle at higher temperatures.</p> Signup and view all the answers

    Which of the following is a non-metallic oxide?

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

    What is the product obtained when sodium thiosulphate reacts with acidified potassium dichromate solution?

    <p>Yellow precipitate of S</p> Signup and view all the answers

    In the reaction involving H2SO4 and potassium dichromate, the oxidation state of chromium changes from _______.

    <ul> <li>6 to + 2</li> </ul> Signup and view all the answers

    Identify the complex ion in which the effective atomic number of the central metal ion is 35.

    <p>[Zn(NH3)4]2+</p> Signup and view all the answers

    The conversion of methyl chloride into methyl fluoride is known as _______.

    <p>Swarts reaction</p> Signup and view all the answers

    How many moles of methyl iodide are required to prepare tetramethyl ammonium iodide from 1 mole of methyl amine?

    <p>4</p> Signup and view all the answers

    Which reagent, when reacted with glucose, confirms the presence of five hydroxyl groups in glucose?

    <p>Acetic anhydride</p> Signup and view all the answers

    Identify the antibiotic drug amongst the following options.

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

    What is the number of atoms per unit cell of a body-centered cube?

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

    Calculate the work done during the reactions represented by the following thermochemical equation at 300 K: CH4 + 2O2 CO2 + 2H2O (g) (g) (g) (l)

    <ul> <li>4988 kJ</li> </ul> Signup and view all the answers

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