MCQ
Fluorine does not show variable oxidation states because $......?$
- AIt is a halogen.
- ✓Of absence of $d-$orbitals.
- CAbsence of $s-$orbital.
- DAbsence of $p-$orbitals.
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${{C}_{6}}{{H}_{6}}+C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[heat]{{{H}_{3}}P{{O}_{4}}}A\xrightarrow[2.\,{{H}_{3}}{{O}^{+}},heat]{1.\,{{O}_{2}},heat}B+C$
The products $(B)$ and $(C)$ are
| Experiment No. | $\begin{array}{c}{[ A ]} \\ \left( mol dm ^{-3}\right)\end{array}$ | $\begin{array}{c}{[ B ]} \\ \left( mol dm ^{-3}\right)\end{array}$ | $\begin{array}{c}{[ C]} \\ \left( mol dm ^{-3}\right)\end{array}$ | Rate of reaction $\left( mol dm ^{-3} s ^{-1}\right)$ |
| $1$ | $0.2$ | $0.1$ | $0.1$ | $6.0 \times 10^{-5}$ |
| $2$ | $0.2$ | $0.2$ | $0.1$ | $6.0 \times 10^{-5}$ |
| $3$ | $0.2$ | $0.1$ | $0.2$ | $1.2 \times 10^{-4}$ |
| $4$ | $0.3$ | $0.1$ | $0.1$ | $9.0 \times 10^{-5}$ |
The rate of the reaction for $[ A ]=0.15 mol dm ^{-3},[ B ]=0.25 mol dm ^{-3}$ and $[ C ]=0.15 mol dm ^{-3}$ is found to be $Y \times 10^{-5} mol dm d ^{-3} s ^{-1}$. The value of $Y$ i. . . . . . .
