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Heat is a form of..................

Heat is a form of...............

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Matter contains .............. (heat/internal energy) in the form of molecular kinetic energy and potential energy

Magnesium reacts vigorously with..................... and produces intense heat and forms magnesium oxide.

Knowledge Check

  • All members of groups 14 when heated in oxygen form oxides. Which of the following is the correct trend of oixdes?

    A
    Dioxides `CO_(2), SiO_(2)` and `GeO_(2)` are acidic while `SnO_(2)` and `PbO_(2)` are amphoteric
    B
    CO,GeO, SnO and PbO are amphoteric
    C
    Monoxides react with haemoglobin to form toxic compounds.
    D
    All oxides burn with blue flame.

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    When heated in oxygen, lithium forms........, sodium forms......., while potassium forms.........

    The heat produced in a wire carrying an electric current depends on the current, the resistance and the time. Assuming that the dependuance is of the product of powers type, guress an eqn. between these quantites uning dimesional analysis. The dimensional formula of resistance is ML^2 A^(-2) T^(-3) and heat is a form of energy.

    Statement-1: Work and Heat are two equivalent form of energy. Statement-2: Work is transfer of mechanical energy irrespective of temperature-differene whereas heat is transfer of thermal energy because of temperature difference only.

    On heating zinc sulfate forms oxide of sulfur and zinc. The oxides formed are:

    On heating iron sulfate forms oxide of sulfur and iron. The oxides formed are:

    Earth's surface re-emits heat into the atmosphere in the form of :-

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