Home
Class 12
CHEMISTRY
(i) Deficiency of which vitamin causes n...

(i) Deficiency of which vitamin causes night-blindness ?
(ii) Name the base that is found in nucleotide of RNA only.
(iii) Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose ?

Text Solution

Verified by Experts

(i) Night blindness is caused due to the deficiency c. vitamin A.
Uracil is the base that is found only in the nucleotide of RNA.
(iii) The reaction of glucose with HI giving n-hexane suggests that all the six carbon atoms are linked in a straight chain, as shown in the reaction given below :
`CHO-(CHOH)_(4)-CG_(2)OH+HI overset DeltatoCH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(2)-CH_(2)`
Promotional Banner

Topper's Solved these Questions

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET - II|12 Videos

  • XII BOARDS

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SET- III|10 Videos

  • SAMPLE PAPER 2019

    XII BOARD PREVIOUS YEAR PAPER ENGLISH|Exercise SECTION: D|1 Videos
XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-C.B.S.E. CLASS-XII
  1. The following data were obtained during the first order thermal decomp...

    Text Solution

    |

  2. (i) Give two examples of macromolecules that are chosen as drug target...

    Text Solution

    |

  3. (i) Deficiency of which vitamin causes night-blindness ? (ii) Name t...

    Text Solution

    |

  4. After the ban on plastic bags, students of one school decided to make ...

    Text Solution

    |

  5. (A)Write the mechanism of the following raction : CH(3)CH(2)OH overs...

    Text Solution

    |

  6. Given the structures of A, B and C in the following reactions : (i)...

    Text Solution

    |

  7. How will you canvert the following : (i) Nitrobenzene into aniline, ...

    Text Solution

    |

  8. (a) Define the following terms : (i) Limiting molar conductivity, ...

    Text Solution

    |

  9. State Faraday's first law of electrolysis . How much charge in terms o...

    Text Solution

    |

  10. How do you prepare : (i) k(2)MnO(4) from MnO(2)? (ii) Na(2)Cr(2)O...

    Text Solution

    |

  11. (i) Name the element of 3d transition series which shows maximum numbe...

    Text Solution

    |

  12. Account for the following : (i) CH(3)CHO is more reactive than CH(3)...

    Text Solution

    |

  13. Give one example each of sol and gel.

    Text Solution

    |

  14. Some liquids on mixing from 'azeotropes'. What are 'azeotropes'?

    Text Solution

    |

  15. Which component of starch is a branched polymer of alpha-glucose and i...

    Text Solution

    |

  16. State Henry's law. What is the effect of temperature on the solubility...

    Text Solution

    |

  17. Define the following terms : (i) Pseudo first order reactions (ii...

    Text Solution

    |

  18. Write the principle behind the following methods of refining : (i)Hy...

    Text Solution

    |

  19. Draw the structure of the following : (i) XeF(2) (ii) BrF(3)

    Text Solution

    |

  20. Account for the follwing : (i) Bi(v) is a stronger oxidizing agent ...

    Text Solution

    |