Q. The production of energy in fuel cell as compare to petrol engine is considerably

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Q. Cells with a size of the button are used in

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Q. The ordinary dry cells are used in

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Q. The flow of electrons (e⁻) through external circuit in cars provides energy to

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Q. In button cells, the negative pole is made up of

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Q. Light weight batteries which produce high voltage are

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Q. Half reaction occur in fuel cell of

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Q. A secondary cell used in a car battery is composed of plates of

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Q. In the enthalpy profile diagram, the reactants and products are represented on

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Q. The symbol for enthalpy is

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Q. Kilojoules per mole are the unit of

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Q. The change in the energy between a chemical reaction and the surroundings at constant temperature is called

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Q. Fireworks release energy in the form of

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Q. The cooling pack which treat a sports injury is kneaded with water and

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Q. Meals can be heated up when camping by the help of

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Q. Whenever there is an occurrence of chemical reaction there lies a change in

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Q. The oxidation of food in our body keeps us

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Q. In an equation, the positive sign (+ΔH) indicates that the reaction is

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Q. The endothermic chemical reaction absorbs energy from

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Q. Anhydrous calcium chloride (CaCl₂) and water (H₂O) react together to heat the food by

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