Chemistry

The first order rate constant for the decomposition of CaCO₃ at 700 K is 6.36 * 10^-3 s^-1 and activation energy is 209 kJ mol^-1.  Its rate constant (in s^-1) at 600K is x * 10^-6. The value of x is_____. (nearest integer).

$\left[GivenR=8.31J{K}^{-1}mo{l}^{-1};log6.36*10^{-3}=-2.19,10^{-4.79}=1.62*10^{-5}\right]$

The number of optical isomers possible for  ${\left[Cr{\left(C_2{O}_4\right)}_3\right]}^{3-}$ is_____.

The major product (A) formed in the reaction given below is

Which one of the following reactions will not yield propionic acid?

Which one of the following is used to remove most of plutonium from spent nuclear fuel?

The major product of the following reaction, if it occur by $S_N^2$  mechanism is:

Which one of the following is the major product of the given reaction?

Given below are two statements:

Statement I: Ethyl pent -4-yn-oate  on reaction with CH₃MgBr gives a 3° -alcohol.

Statement II: In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH₃MgBr.

In the light of the above statements, choose the most appropriate answer from the options given below.

The correct order of ionic radii for the ions,  $P^{3-},S^{2-},C{a}^{2+},K^{+},C{l}^{-}is:$

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803K?