How many ions are produced in aqueous solution of [Co ( H_2 O)_6 …

$\mathop {\begin{array}{*{20}{c}}
{OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\
{C{H_2} = C - C{H_2} - C - C{H_3}}
\end{array}}\limits_{(I)} \rightleftharpoons $

$\mathop {\begin{array}{*{20}{c}}
{OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\
{C{H_3} - C - C{H_2} - C - C{H_3}}
\end{array}}\limits_{(II)} \rightleftharpoons $

$\mathop {\begin{array}{*{20}{c}}
{OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\
{C{H_3} - C = CH - C - C{H_3}}
\end{array}}\limits_{(III)} $

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Ammonolysis of Alkyl halides followed by the treatment with $NaOH$ solution can be used to prepare primary, secondary and tertiary amines. The purpose of $NaOH$ in the reaction is :

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In the given pair of alcohol, in which pair second alcohol is more reactive than first towards hydrogen bromide?

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In context with the transition elements, which of the following statements is incorrect?

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For a given reaction $t_{1/2} = \frac{1}{k.a}$ the order of reaction will be

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The noble gas was first time discovered by

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Assertion : According to transition state theory for the formation of an activated complex, one of the vibrational degree of freedom is converted into a translational degree of freedom.