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

View solution

Q. The ordinary dry cells are used in

View solution

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

View solution

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

View solution

Q. Light weight batteries which produce high voltage are

View solution

Q. Half reaction occur in fuel cell of

View solution

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

View solution

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

View solution

Q. The symbol for enthalpy is

View solution

Q. Kilojoules per mole are the unit of

View solution

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

View solution

Q. Fireworks release energy in the form of

View solution

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

View solution

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

View solution

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

View solution

Q. The oxidation of food in our body keeps us

View solution

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

View solution

Q. The endothermic chemical reaction absorbs energy from

View solution

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

View solution

Q. The chemical reactions which emit energy to surroundings are called

View solution