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Chemistry Test - 62
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Chemistry Test - 62

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  • Question 1/10
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    Which of the following acts both as oxidising and reducing agent?

    Solutions

    Nitrous acid act as an oxidising agent because it oxidises potassium iodide to iodine. It is also a reducing agent because it decolourises acidified potassium permanganate solution.

    Nitric acid acts only as an oxidising agent

    Ammonia acts only as a reducing agent

    Nitrogen peroxide acts only as an oxidising agent.

  • Question 2/10
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    Formation of cation occurs by

    Solutions

    Formation of cation occurs byloss of electron.

  • Question 3/10
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    Blue litmus paper is converted into red in solution of _______

    Solutions

    Blue litmus paper is converted into red in solution of Acid.

  • Question 4/10
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    Which of the following processes is used to remove reducible oxides from the metal?

    Solutions

    Poling is used to remove reducible oxides from the metal.

  • Question 5/10
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    An element which is preserved under water is

    Solutions

    White phosphorus undergoes spontaneous combustion when exposed to air. In order to prevent this spontaneous ignition, it is preserved under water.

  • Question 6/10
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    Which acid is produced when milk gets sour?

    Solutions

    Lactic acid is produced when milk gets sour.

  • Question 7/10
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    Of the following elements, which one has the same oxidation state in all of its compounds?

    Solutions

    Fluroinehas the same oxidation state in all of its compounds.

  • Question 8/10
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    The main element used in the vulcanisation of rubber is

    Solutions

    In vulcanization, cruder rubber is heated with 3% sulphur at about for 1200C for 2-3 hours.

    Vulcanised rubber is a vastly improved product.

  • Question 9/10
    1 / -0

    Which of the following does not contain the material particles

    Solutions

    Gamma - raysdoes not contain the material particles.

  • Question 10/10
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    Which combination of atoms can form a polar covalent bond?

    Solutions

    Only H and Br form Polar Covalent Bond.

    Covalent bonding:

    Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

    1. Polar Covalent Bond

    2. Nonpolar Covalent Bond

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