A device which converts chemical energy into electrical energy is called __________?

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A device which converts chemical energy into electrical energy is called __________?

A. motor
B. generator
C. moving-coil meter
D. battery

Batteries are devices that convert stored chemical energy into useful electrical energy. It consists of a number of voltaic cells connected in series by a conductive electrolyte containing anions and cations. A battery may be thought of as a clever variant of a standard exothermic chemical reactor that yields chemical products with lower energy content than the chemical reactants.
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The gas used in a refrigerator to cool water is___________?

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The gas used in a refrigerator to cool water is___________?

A. Nitrogen
B. Carbon dioxide
C. Methane
D. Tetrafluoroethane

Tetrafluoroethane: It is one of the commonly used refrigerant gases which you can find in almost all the present time refrigerators. This gas is condensed effectively so that it can cool down the surroundings of the machine without causing the problem of ozone depletion.