Which one of the following processes involve chemical reactions?(a) Storing of oxygen gas under pressure in a gas cylinder(b) Liquefaction of air(c) Keeping petrol in a china dish in the open(d) Heating copper wire in presence of air at high temperature

. Mention the type of chemical reaction that takes place when:(i) a magnesium ribbon is burnt in air.(ii) limestone is heated.(iii) silver bromide is exposed to sunlight.(iv) electricity is passed through acidified water.(v) ammonia and hydrogen chloride are mixed with each other.Write the chemical equation for each reaction.

hich among the following are physical or chemical changes?(a) Evaporation of petrol(b) Burning of Liquefied Petroleum Gas (LPG)(c) Heating of an iron rod to red hot.(d) Curdling of milk(e) Sublimation of solid ammonium chloride

Which of these is one of the five types of chemical reactions?

Which One of the following processes does not involve a chemical reaction?a.Melting of candle wax when heatedb.Burning of candle wax when heatedc.Ripening of bananad.Digestion of food in our stomach

Many power plants produce electricity using natural gas, a fuel composed mostly of methane (CH4). These power plants burn methane at high temperatures and pressures, causing it to combine with oxygen (O2) in the air. This creates a mixture of hot gases that includes carbon dioxide gas (CO2) and water vapor (H2O). The energy in this mixture of gases is used to make electricity.In the chemical reaction described in the passage, which of the following are products? Select all that apply.carbon dioxide (CO2)methane (CH4)oxygen (O2)water (H2O)SubmitQuestions