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Chemistry Test 182
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Chemistry Test 182

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  • Question 1/10
    4 / -1

    In a closed insulated container, a liquid is stirred with a paddle to increase the temperature, which of the following is true?

    Solutions

    Internal energy is dependent upon temperature and according to first law of thermodynamics total energy of an isolated system remains same, i.e., in a system of constant mass, energy can neither be created not destroyed by any physical or chemical change but can be transformed from one from to another For closed insultated container, q = 0, so, E = +W, as work is done by the system

     

  • Question 2/10
    4 / -1

    At 100°C the Kw of water is 55 times its value at 25°C. What will be the pH of neutral solution? (log 55 = 1.74)

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  • Question 3/10
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    Which of the following is a redox reaction?

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  • Question 4/10
    4 / -1

    Which statement is correct for hydrogen?

    Solutions

    The correct option is (c). In H2O, hydrogen has +1 oxidation no. In CaH2, hydrogen has 1 oxidation no.

     

  • Question 5/10
    4 / -1

    Which of the following represents a correct sequence of reducing power of the following elements?

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  • Question 6/10
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    Which of the following statements about anhydrous aluminium chloride is correct?

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  • Question 7/10
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    The IUPAC name of

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  • Question 8/10
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    Ethyl hydrogen sulphate is obtained by reaction of H2SO4 on

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  • Question 9/10
    4 / -1

    Green-house gases

    Solutions

    Radiation coming from sun or outerspace have high energy or short wavelength, which are allowed to enter by green house gases. However, radiation emitted by earth is in infrared region, having long wavelength, are reflected back by the envelope of green house gases.

     

  • Question 10/10
    4 / -1

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