Home
Class 12
CHEMISTRY
When tert - butanol and n- butanól are s...

When tert - butanol and n- butanól are separately treated with a few drops of dilute KMnó4. in one case, only, the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction and what is the brown precipitate?

Text Solution

Verified by Experts

The alcohol which is readily oxidised by dil `KMnO_+` is primary alcohol. ie.. `n` - butanol. Tertiary alcohols are not oxidised by `KMn O_4 figure
Promotional Banner

Topper's Solved these Questions

  • ALDEHYDES, KETONES AND CARBOXYLIC ACIDS

    V PUBLICATION|Exercise QUESTION BANK|79 Videos

Similar Questions

Explore conceptually related problems

When a white crystalline compound 'X' is heated with K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) a red dish brown gas 'A' is evolved. On passing 'A' into caustic soda solution, a yellow coloured solution of 'B' is obtained. Neutralising the solution 'B' with acetic acid and on subsequent addition of lead acetate a yellow precipitate C is obtained. When 'X' is heated with NaOH a colourless gas is evolved and on passing this a gas into K_(2)HgI_(4) (Nessler's reagent) solution a reddish brown precipitate D is formed. Identify '(A), (B), (C), (D) and X. Write equations for the reactions involved.

When we pass carbon dioxide gas through a green coloured solution of potassium manganate, the colour of solution changes to purple and a brown coloured solid gets precipitated. The green colour of potassium manganate solution also becomes purple when it is subjected to electrolysis using iron electrodes. In following reaction 3 K_2 underset("(green)")(MnO_4 + 2H_2 O + 4CO_2 to underset("(purple)")(2KmnO_4 )+MnO_2 + 4KHCO_3 the function of CO_2 is

a. A blackish brown coloured solid A when fused with alkali metal hydroxides in presence of air produces a dark green coloured compound B which on electrolytic.oxidation in alkaline medium gives a dark purple coloured compound C. Identify A, B and C and write the reactions involved. (b) what happens when an acidic solution of the green compotind 'B' is allowed to stand for sometime? Give the equations involved. What is this type of reaction called?

When light rays enter from one medium to another, refraction takes place. Consider refraction of light at a spherical surface separating two media of refractive indices n and n_2 (n_2 > n_1) .In the above case let the first medium be air and the second medium glass of refractive index 1.5, R of spherical surface = 20cm. An object is placed in air 100cm from the glass surface. At what position the image is formed?

V PUBLICATION-ALCOHOLS,PHENOLS AND ETHERS-QUESTION BANK
  1. Predict the major product of the following reaction: '(##VPUHSSCHEXI...

    Text Solution

    |

  2. A compound A C+ H10 O is found to be soluble in concentrated sufphuri...

    Text Solution

    |

  3. When tert - butanol and n- butanól are separately treated with a few d...

    Text Solution

    |

  4. An optically active alcohol (A)[C₆H₁₀O] absorbs two moles of hydrogen ...

    Text Solution

    |

  5. A compound D (C8 H10 O) upon treatment with alkaline solution of i...

    Text Solution

    |

  6. An organic compound (A) C(6)H(12)O(3) on treatment with concentrated H...

    Text Solution

    |

  7. An organic compound A on treatment with CHCl3 and KOH gives two compou...

    Text Solution

    |

  8. How will you bring about the following converslons? (i) Phenol to O - ...

    Text Solution

    |

  9. An organic compound A, C₈H₆ on treatment with dilute sulphuric acid-co...

    Text Solution

    |

  10. A compóund A with molecular formula C4 H10O. on oxidation forms compou...

    Text Solution

    |

  11. Dehydration of FIGURE give a compound which exists in two isomeric for...

    Text Solution

    |

  12. An organic compound A gives positive Liebermann reaction and on treatm...

    Text Solution

    |

  13. Two diffferent Grignard reagents x and y produce C6 H5 CH2 C(CH3)2 OH ...

    Text Solution

    |

  14. How woụld you prepare 4 - methoxy phenol from bromobenzene in not mor...

    Text Solution

    |

  15. Which of the following will not be soluble in sodium bicarbonate?

    Text Solution

    |

  16. Among the following compounds, strongest acid is? : HC≡CH, C6 H6, ...

    Text Solution

    |

  17. Ethanol when reacted with PCl5 gives A, POCl3 and HCl. A reacts with ...

    Text Solution

    |

  18. Absolute Alcohol is prepared by : Vaccum distilation, Azeotropic di...

    Text Solution

    |

  19. Propan-1-ol can be prepared from propene by : (H2 O) /( H2 SO4) , ...

    Text Solution

    |

  20. When phenyl magnesium bromide reacts with tertiary butanol, which of t...

    Text Solution

    |