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(A): Alcoholic fermentation involves con...

(A): Alcoholic fermentation involves conversion of sugar into ethanol by the action of yeast.
(R): Fermentation involves the liberation of `CO_(2)` gas.

A

Both A & Rare true, R is the correct explanation of A

B

Both A & Rare true, R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

Text Solution

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The correct Answer is:
B
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All titration which involves the direct titration of Iodine with a reducing agent are grouped under lodimetry. Iodimetry is employed to determine the strength of reducing agent such as sodium thio sulphate I_(2) + 2Na_(2)S_(2)O_(3) rarr 2I^(-)+S_(4)O_(6)^(-) If iodine is liberated as a result of chemical reaction involving oxidation of an idodide ion by a strong oxidizing agent in neutral or acidic medium the liberated iodine is then titrated with reducing agent. This titration is called lodometry. Todometry is used to estimate the strength of oxidizing agent. For example the estimation of Cu^(++) with thiosulphate. Cu^(+ +) +I^(-) Cu_(2)I_(2)+I_(2) , I_(2) +S_(2)O_(3)^(-) rarrS_(4)O_(6)^(-) +I^(-) Starch used as indicator near the end point which form blue colour complex with I_(3)^(-) . The blue colour disappears when 10 mL of H_2O_2 solution on treatment with KI and titration of liberated I_2 required 10 mL of 1 N hypo . Thus H_2O_2 is :

All titration which involves the direct titration of Iodine with a reducing agent are grouped under lodimetry. Iodimetry is employed to determine the strength of reducing agent such as sodium thio sulphate I_(2) + 2Na_(2)S_(2)O_(3) rarr 2I^(-)+S_(4)O_(6)^(-) If iodine is liberated as a result of chemical reaction involving oxidation of an idodide ion by a strong oxidizing agent in neutral or acidic medium the liberated iodine is then titrated with reducing agent. This titration is called lodometry. Todometry is used to estimate the strength of oxidizing agent. For example the estimation of Cu^(++) with thiosulphate. Cu^(+ +) +I^(-) Cu_(2)I_(2)+I_(2) , I_(2) +S_(2)O_(3)^(-) rarrS_(4)O_(6)^(-) +I^(-) Starch used as indicator near the end point which form blue colour complex with I_(3)^(-) . The blue colour disappears when When 159.50g of CuSO_4 in a solution is reacted with KI, then the liberated iodine required 100 ml 1 M Na_(2)S_(2)O_3 for complete reaction, then what is the percentage purity of sample used in making the solution.

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AAKASH SERIES-ALCOHOLS, PHENOLS AND ETHERS-ALCOHOLS (Objective exercise-1)
  1. When 2-butanol is heated with an excess of concentrated sulphuric acid...

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  2. The structural formula of alcohol that on dehydration would give 2-met...

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  3. CH(3)COOH + C(2)H(5)OH underset("heat")overset("conc." H(2)SO(4))to CH...

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  4. C(2)H(5)OH can be converted in to C(2)H(5)Cl by reacting with

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  5. A mixture of anhydrous ZnCl(2)+conc.HCI is known as

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  6. When C(2)H(5)OH reacts with sodium metal, gas released is

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  7. Action of caustic soda and chlorine on ethyl alcohol gives

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  8. Which of the following compound is formed when ethanol reacts with ace...

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  9. In the reaction, underset(vapour)(C(2)H(5)OH) overset(Cu)underset(30...

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  10. C2H5OH + SOCl2 overset("Pyridine")(rarr)X + Y + Z. In this reaction X,...

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  11. The compound that reacts with CH(3)MgBr to yield methane as one of the...

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  12. The correct order of reactivity of hydrogen halides with ethyl alcoho...

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  13. What is the hybridisation state(s) of the atoms in X formed in the fol...

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  14. (A): Alcoholic fermentation involves conversion of sugar into ethanol ...

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  15. (A): Ethanol is miscible in all proportions with water. (R): Hydroge...

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  16. (A) Sodium can't be used for drying ethyl alcohol. (R) Sodium di...

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  17. (A) Ethyl alcohol is soluble in organic solvents (R) Ethyl alcoho...

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  18. (A): Dehydration of alcohols can be carried out with conc H(2)SO(4) bu...

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  19. (A): Alcohols on dehydration can produce ether as well as alkene under...

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  20. (A): Oxidation of tertiary alcohols requires strong oxidising agent an...

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