In the complex Fe(CO)_x, the value of x is :

${A_{2\left( g \right)}} \longrightarrow {B_{\left( g \right)}} + \frac{1}{2}\,{C_{\left( g \right)}}$ the increase in pressure from $100\, mm$ to $120\, mm$ is noticed in $5\,\min$. The rate of dissappearence of $A_2$ in $mm\, min^{-1}$ is

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$40\, \mathrm{~g}$ of glucose (Molar mass $=180$ ) is mixed with $200\, \mathrm{~mL}$ of water. The freezing point of solution is $.....\,\mathrm{K}$. (Nearest integer)

[Given : $\mathrm{K}_{\mathrm{f}}=1.86 \,\mathrm{~K} \,\mathrm{~kg} \,\mathrm{~mol}^{-1} ;$ Density of water $=$ $1.00 \,\mathrm{~g}\, \mathrm{~cm}^{-3} ;$ Freezing point of water $\left.=273.15\, \mathrm{~K}\right]$

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A sample of chloroform being used as anaesthetic is tested by

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Chloropicrin is obtained by the reaction of

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In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca²⁺) and fluoride ion (F⁻) are:

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Simplified absorption spectra of three complexes $((i),$$( ii)$ and $( iii ))$ of $M ^{ n +}$ ion are provided below; their $\lambda_{\max }$ values are marked as $A, B$ and $C$ respectively. The correct match between the complexes and their $\lambda_{\max }$ values is

$(i)$ $\left[ M ( NCS )_{6}\right]^{(-6+ n )}$

$(ii)$ $\left[ MF _{6}\right]^{(-6+ n )}$

$(iii)$ $\left[ M \left( NH _{3}\right)_{6}\right]^{ n ^{+}}$