10.Write the balanced chemical equation for the following reactions:
(i) Phosphorous burns in chlorine to form phosphorous penta-chloride.
(ii) Burning of natural gas.
(iii) The process of respiration.
(iii) Dilute sulphuric acid reacts with sodium carbonate.
(iv) Egg shells are dropped in hydrochloric acid.
(v) Copper (II) oxide reacts with dilute hydrochloric acid.
Answers
Answer:
Explanation:
(i)2NaOH(aq) + Zn(s) -> Na2ZnO2 + H2(g)
(ii) CO2 + Ca(OH)2 -> CaCO3 +H2O
(iii) H2SO4 + Na2CO3 -> Na2SO4 + H2O +CO2
(iv) CaCO3 + 2HCl -> CaCl2 +H2O+CO2
(v) CuO + 2HCl -> CuCl2 + H2O
1.Phosphorus burns in chlorine gas to form phosphorus pentachloride. Phosphorus pentachoride or PCl5 is a colourless, sensitive to water and moisture solid.
2.Natural gas is a relatively clean burning fossil fuel
Burning natural gas for energy results in fewer emissions of nearly all types of air pollutants and carbon dioxide (CO2) than burning coal or petroleum products to produce an equal amount of energy.
3.Respiration is the process by which energy is released from food in our body. The function of respiratory system is to breathe in oxygen for respiration producing energy from food, and to breathe out carbon dioxide. ... Gases exchanged are oxygen and carbon dioxide.
4.Egg shell contains calcium carbonate. When HCl is poured over egg shells, it dissolves in HCl to form calcium chloride and water and carbon dioxide is liberated with effervescence.
5.Copper(II) oxide reacts with hydrochloric acid. Black copper(II) oxide (CuO) reacts slowly with 1 M hydrochloric acid (HCl) at room temperature, producing blue solution of copper(II) chloride (CuCl2) and water: CuO + HCl -> CuCl2 + H2O.