For a reaction, $A⟶B+C.$ it was found that at the end of 10 minutes from the start, the total optical rotation of the system was ${50}^0$ and when the reaction is complete, it was ${100}^0$. Assuming that only B and C are optically active and dextro rotatory the rate constant of this first order reaction would be

Q. Fora reaction, $A\to B+C,$ it was found that at the end of 10 minutes from the start, the total optical rotation of the system was ${50}^o$ and when the reaction is complete, it was ${100}^{o}C$ Assuming that only B and C are optically active and dextro rotatory, the rate constant of this first order reaction would be ?

Q. For a reaction $A⟶B+C$. it was found that at the end of 10 minutes from the start the total optical rotation of the system was ${50}^o$ and when the reaction is complete, it was ${100}^{o}C$. Assuming that only $B$ and $C$ are optically active and dextrorotatory. Calculate the rate constant of this first order reaction.

Q. For a first order reaction $A\to 2B+C$. It was found that at the end of 10 minutes from the start,the total optical rotation of the system was ${60}^0$ and when the reaction is complete.It was ${180}^0$.The B and C are only optically active and initially only A was taken.
i) What is the rate constant of the above reaction (in hour)?
ii) At what time (in minute) from the start, total optical rotation will be ${90}^0$.
Take log2=0.3,log3=0.48,log7=0.85, in 10 =2.3

Q. The reaction $A\left(aq\right)\to B\left(aq\right)+C\left(aq\right)$ is monitored by measuring optical rotation of reaction mixture at different time interval. The species A, B and C are optically active with specific rotations ${20}^{\circ },{30}^{\circ }$ and $-{40}^{\circ }$ respectively. Starting with pure A if the value of optical rotation was found to be ${2.5}^{\circ }$ after ${6.93}^{\circ }$ minutes and optical rotation was $-5^{\circ }$ after infinite time. Find the rate constant for the first-order conversion into A into B and C: