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Which form of heat believed in before th...

Which form of heat believed in before the modern time ?

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Knowledge Check

  • Which of the following statements about the modern periodic table is correct?

    A
    It has 18 horizontal rows known as periods.
    B
    It has 8 vertical columns known as periods.
    C
    It has 18 vertical columns known as groups.
    D
    It has 7 horizontal rows known as groups.

  • Which of the following statements related to the modern periodic table is incorrect?

    A
    The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-shell.
    B
    The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.
    C
    Each block contains a number of columns equal to the number of electrons that can occupy that subshell.
    D
    The block indicates value of azimuthal quantum number (l) for the last subshell that received electrons in building up the electronic configuration.

  • Which of the following elements does not form hydride by direct heating with dihydrogen ?

    A
    Be
    B
    Mg
    C
    Sr
    D
    Ba

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    Which of the following is the valence shell for the elements of second period of the modern periodic table ?

    Which scientist proposed the periodic law for the modern periodic table ?

    Suppose that 1 L of water is heated for a certain time to rise its temperature for 2^@ C. If 2L of water is heated for the same time, how much of its temperature would rise?

    Which of the following scientist believed that the origin oflife is due to chemical reaction in past?

    Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

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