Unit :15 Chemical reaction
1). In which chemical reaction, does the exchange of ions or groups between two substances takes place?i. Combinationii. Double displacementiii. Additioniv. NeutralizationAns: ii. Double displacement 2). What happens when dilute hydrochloric acid is added to an iron nail?i. No reaction takes place.ii. Hydrogen gas and iron chloride are produced.iii. Chlorine gas and iron hydroxide are…
