Read the given passage and answer the questions: Most of the chemical reactions are accelerated by increase in temperature. For example, in decomposition of N_(2)O_(5), the time taken for half of the original amount of material to decompose is 12 min at 50""^(@)C, 5 h at 25 ""^(@)C and 10 days at 0 ""^(@)C. You also know that is a mixture of potassium permaganate and oxalic acid H_(2)C_(4)O_(4), potassium permaganate KMnO_(4) gets decolourised faster at a higher temperature than at a lower temperature. It has been found that for a chemical reactionwith rise in temperature by 10 ""^(@)C, the rate constant is nearly doubled. The temperature dependenceof the rate of a chemical reaction can be accurately explained by Arrhenius equation: k=Ae^(-E_(a)//RT) where A is the frequency factor, E_(a) is the activation energy measured in joules per mole. Q. In the volumetric titration of oxalic acid against potassium permanganate (KMnO_(4)), we heat the oxalic acid solution to about 40 ""^(@)C before performing the titration. Why?

Read the given passage and answer the questions: Most of the chemical

1.	Read the given passage and answer the questions: Most of the chemical reactions are accelerated by increase in temperature. For example, in decomposition of N_(2)O_(5), the time taken for half of the original amount of material to decompose is 12 min at 50""^(@)C, 5 h at 25 ""^(@)C and 10 days at 0 ""^(@)C. You also know that is a mixture of potassium permaganate and oxalic acid H_(2)C_(4)O_(4), potassium permaganate KMnO_(4) gets decolourised faster at a higher temperature than at a lower temperature. It has been found that for a chemical reactionwith rise in temperature by 10 ""^(@)C, the rate constant is nearly doubled. The temperature dependenceof the rate of a chemical reaction can be accurately explained by Arrhenius equation: k=Ae^(-E_(a)//RT) where A is the frequency factor, E_(a) is the activation energy measured in joules per mole. Q. In the volumetric titration of oxalic acid against potassium permanganate (KMnO_(4)), we heat the oxalic acid solution to about 40 ""^(@)C before performing the titration. Why?
Answer» Solution :It takes a much longer TIME to BREAK the bonds in oxalic acid and GIVE the products at room temperature. Hence heated is required to ACCELERATE the reaction.