Chemical Equations with Physical States Notations

Iron = Reddish brown powder Copper = Green coating Silver = Black coating Gold = No visible coating

Adding antioxidants to food = Preventing rancidity of fats and oils Keeping food in air-tight containers = Slowing down oxidation of fats and oils Flushing bags of chips with nitrogen gas = Preventing chips from getting oxidized Regularly cleaning metal objects = Preventing formation of corrosion

Process of metals getting tarnished due to substances around them = Corrosion Change in smell and taste of fats/oils due to oxidation = Rancidity Substances that prevent oxidation in food containing fats/oils = Antioxidants Gas used to prevent chips from getting oxidized = Nitrogen

<p>Damaged car bodies, bridges, iron railings, ships = Iron Black coating on silver and green coating on copper = Silver and Copper Reddish brown powder on iron articles = Iron No visible coating on gold objects = Gold</p> Signup and view all the answers

<p>Corrosion = Process where metals are attacked by substances around them like moisture or acids Rancidity = Change in smell and taste of fats/oils due to oxidation Antioxidants = Substances added to food to prevent oxidation in fats/oils Nitrogen gas flushing = Process used to prevent chips from getting oxidized</p> Signup and view all the answers

<p>Exothermic reactions release heat to the surroundings, like combustion. Endothermic reactions absorb heat from the surroundings, like photosynthesis.</p> Signup and view all the answers

<p>Respiration is exothermic because it releases energy in the form of heat and ATP during the breakdown of glucose.</p> Signup and view all the answers

<p>Decomposition reactions involve the breakdown of a compound into simpler substances, while combination reactions involve the formation of a compound from simpler substances.</p> Signup and view all the answers

<p>Displacement reactions involve an element displacing another in a compound, while double displacement reactions involve the exchange of ions between two compounds.</p> Signup and view all the answers

<p>In the refining of silver, copper metal displaces silver from silver nitrate solution, forming copper nitrate and elemental silver.</p> Signup and view all the answers