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(A): Oxidation of tertiary alcohols requ...

(A): Oxidation of tertiary alcohols requires strong oxidising agent and elevated temperature.
(R): Oxidation of tertiary alcohols involves cleavage of C - C bond.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

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The correct Answer is:
A
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(A) Acetone gets oxidised by strong oxidising agents like Ag^(+),Cu^(+2) , etc. (R) Oxidation of acetone involved carbon carbon bond cleavage.

(A) Tertiary alcohols are more reactive for nucleophilic substitution reactions (R) The C-O bond is weak in tertiary alcohol

(A) : With KMnO_(4)//H^(+) , tertiary alcohols are oxidised to ketones . (R) : Tertiary alcohols do not contain alpha - hydrogen .

(A): Iodine displaces bromine from KBrO_3 (R): Iodine is strong oxidizing agent than bromine.

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.

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 In the reaction, 2CuSO_(4) +4KI rarr Cu_(2)I_(2) + 2K_(2)SO_(4)+I_2 the ratio of equivalent weight of CuSO_4 to its molecular weight is:

Primary (or) Secondary (or) Tertiary alcohols on oxidation finally give

Compute the heat of formation of liquid methyl alcohol in kilojoules per mole, using the following data. Heat of vapourisation of liquid methyl alcohol =38 kJ/mol. Heat of formation of gaseous atoms from the elements in their standard states , H= 218kJ/mol, C= 715kJ/mol, O= 249 kJ/mol. Average bond energies :C-H =415kJ/mol, C-O=365 kJ/mol, O-H = 463 kJ/mol.

AAKASH SERIES-ALCOHOLS, PHENOLS AND ETHERS-ETHERS (OBJECTIVE EXERCISE-4)
  1. (A) The boiling point of C2H5OH is less than that of H2O , though the...

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  2. (A) Addition of C2H5OH to CH3 MgI gives methane. (R) C2H5OH is mor...

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

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  4. (A) Acetone and propenol-2 are tautomers. (R) Propanone and propen...

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  5. (A) Alcohols act as Bronsted - Lowry bases. (R) In alcohols the lo...

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  6. (A) Anhydrous ZnCl2 is used in reaction of alcohols with HCI. (R)...

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  7. (A) Alcohols can act as nucleophiles (R) Alcohols form salts with...

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  8. (A) Tertiary alcohols are more reactive for nucleophilic substitution ...

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  9. (A) Reactivity of primary alcohol is more than secondary alcohols towa...

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  10. (A) The bond angle C-O-H in alcohol is less than in phenols (R) I...

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  11. (A) In ethers, bond angle C-O-C is more than tetrahedral angle (R...

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  12. (A) n-propyl alcohol is prepared from propene by the action of B2H6 f...

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  13. (A) During acid catalysed esterification, oxygen atom of alcohol is pr...

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  14. (A) Lucas reagent is used to distinguish 1^@ , 2^@ and 36@ alcohols ...

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  15. (A) Addition of water to (CH3)2 - C = CH - CH3 gives (CH3)2 - COH - C...

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  16. (A) 1-propanol & 2-propanol can be distinguished by haloform test ...

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  17. (A) Alcohols are acidic in nature but donot react with NaOH solution ...

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  18. (A) The acidity of alcohols follow the order 1^@ gt 2^@ gt 3^@ (R...

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  19. (A) For the reduction of esters in to alcohols Ni//H2 is preferred tha...

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  20. (A) Dichloro carbene acts as electrophile in Reimer-Tiemann reaction. ...

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