7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

$\mathop {{C_4}{H_8}}\limits_{{\text{Cyclobutane}}} \xrightarrow{{Heat}}2{C_2}{H_4}$ The rate constant is $2.3 \times 10^{-4}\ sec^{-1}.$ In what time will the molar ratio of the ethylene to cyclobutane in reaction mixture attain the value $1$ ? ...... $\min$

$(I)$ They have high melting points, higher than those of pure metals

$(II)$ They are very hard

$(III)$ They retain metallic conductivity

$(IV)$ They are chemically more reactive than the pure metals