Home
Class 12
CHEMISTRY
The hydrolysis of sucrose was studied wi...

The hydrolysis of sucrose was studied with the help of calorimeter and following data were
`{:(,"Collected time (min.)",:0,70,oo),(,"observed rotation (degrees)",:44,16.5,-11):}`
the time taken when reaction mixture wil be optically inactive ? (Given : In 2=0.7,in 3=1.1, in 5=1.6)

A

16 min.

B

69.47 min.

C

160 min.

D

1.6 min.

Text Solution

Verified by Experts

The correct Answer is:
C
`k=(1)/(t)ln((r_(0)-r_(oo))/(r_(1)-t_(oo)))`
`k=(1)/(70)ln((44+11)/(16.5+11))`
`k=(l n 2)/(70)`
when solution is optically inactive `r_(1)=0`
`:. k=(1)/(t)ln((r_(0)-r_(oo))/(0-r_(oo)))`
`(ln 2)/(70)=(1)/(t)ln((44+11)/(11))`,
`(0.7)/(70)=(1)/(t) xx 1.6`, t = 160 min
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    DISHA PUBLICATION|Exercise EXERCISE 1 : CONCEPT BUILDER (TOPICWISE)(TOPIC 3 : Theories of Rate of Reaction)|17 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    DISHA PUBLICATION|Exercise EXERCISE-2: CONCEPT APPLICATOR|30 Videos

  • CHEMISTRY IN EVERDAY LIFE

    DISHA PUBLICATION|Exercise Exercise|88 Videos

Similar Questions

Explore conceptually related problems

Optical rotation of sucrose in 1 N Hcl at various times was found as shown below : {:("Time (sec)",0,7.18,18.0,27.05,oo),("Rotation (deg)",+24.09,+21.7,+17.7,+15.0,-10.74):} Shwo that the inversion of scrose is a first order reaction

For the reaction Ato prouducts, the following data is given for a particular run. {:("time(min.):",0,5,15,25),(1/([A])(M-1):,1,2,4,8):} Determine the order of the reaction.

Cane sugar is gradualaly converted into dextrose and laevuloe by dilute acid. The rate of inversion is observed by measuring the polarisation angle, at various times, when the following results are obtained: {:("Time (min)",0,10,20,30,40,100,oo),("Angle",32.4,28.8,25.5,22.4,19.6,-6.1,-14.1):} Show that the reaction is of first order. Calculate the value of t, when the solution is optically inactive.

AtoB first order reaction A is ooptical active and B is optically inactive. A series of experiment were conducted on a solution of A {:(,"Time",0,60 min,oo),(,"optical rotation",82^(@),77^(@),2^(@)):} assume some imurity is present calculate the otical rotation for 5 hours.) (Given in 1.066=0.064, e^(0.16) =1.17)

Inverison of sucrose is studied by measuring the angle of rotation at any time t . underset(("Sucrose"))(C_(12)H_(22)O_(11))underset(("Glucose"))(+H_(2)O) overset(H^(o+))rarrunderset(("Fructose"))(C_(6)H_(12))O_(6)+C_(6)H_(12)O_(6) It is found that (r_(oo) - r_(0)) prop a and (r_(oo) - r_(t)) prop, (a-x) , where r_(0), r_(t) , and r_(oo) are the angle of rotation at the start, at the time t , and at the end of the reaction, respectively. Form the following values calculate the rate constant and the time at which the solution is optically inactive. |{:("Time (min)",0.0,46.0,oo),("Rotation of polarized light (degree)",24.1,10.0,-10.7):}|

In the data given below, the observation p is missing 2 . 5 , 1 . 5, p, 1. 7, 2 . 5, 1. 3, 3 . 5 If the mean is 2 . 5 then the missing observation p will be

DISHA PUBLICATION-CHEMICAL KINETICS -EXERCISE 2 : CONCEPT APPLICATOR
  1. Decomposition of NH(4)NO(2)(aq into N(2)(g) and 2H(2)O(l) is first ord...

    Text Solution

    |

  2. For a reaction Aoverset(k(r)=0.6M min^(-1))to2B starting with 1 M of...

    Text Solution

    |

  3. For an elementary reaction , X(g)toY(g)+Z(g) the half life period is...

    Text Solution

    |

  4. Consider following two competing first ordr reactions, Poverset(k(1)...

    Text Solution

    |

  5. For the reaction (i) A overset(k(1))to P (ii) B overset(k(II))to...

    Text Solution

    |

  6. The decomposition of N(2)O(5) in carbon tetrachloride was followed by...

    Text Solution

    |

  7. The half-life of first order decomposition of NH(4)NO(3) is 2.10 hr at...

    Text Solution

    |

  8. The hydrolysis of sucrose was studied with the help of calorimeter and...

    Text Solution

    |

  9. The value of t(0.875)/(t(0.50) for n^(th) order reaction is

    Text Solution

    |

  10. In an attempt to compare the half-lives of two radioactive elements A...

    Text Solution

    |

  11. The initial rates ofreaction 3A + 2B + C to Products, at different ...

    Text Solution

    |

  12. The intergrated rate equation is Rt = log, C(0) - log C(t). The stra...

    Text Solution

    |

  13. The rate constant for a second order reaction is k=(2.303)/(t(a-b))log...

    Text Solution

    |

  14. The decomposition of N(2)O(5) occurs as, 2N(2)O(5) rarr4NO(2)+O(2) and...

    Text Solution

    |

  15. Graph between log k and 1//T [k rate constant (s^(-1)) and T and the t...

    Text Solution

    |

  16. For reaction A rarr B , the rate constant K(1)=A(1)(e^(-E(a(1))//RT)) ...

    Text Solution

    |

  17. The rate constant, the activation energy and the Arrhenius parameter o...

    Text Solution

    |

  18. The racemisation of alpha - pinene is first order reaction. In the ga...

    Text Solution

    |

  19. The activation energy of a reaction is 9.0 kcal//mol. The increase i...

    Text Solution

    |

  20. The rate constant for the decomposition of a certain substance is 2.8...

    Text Solution

    |