$C{H_3} - CH = C{H_2}\mathop {\xrightarrow{{{\text{Water gas (}}CO + {H_2})}}}\limits_{{{400}\,^o}C,{\kern 1pt} {H_3}P{O_4}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,COOH} \\
{|\,\,\,\,} \\
{C{H_3} - CH - C{H_3}}
\end{array}}\limits_{Isobutyric\,acid} $
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$1.$ Among the following, the correct statement is
$(A)$ Phosphates have no biological significance in humans
$(B)$ Between nitrates and phosphates, phosphates are less abundant in earth's crust
$(C)$ Between nitrates and phosphates, nitrates are less abundant in earth's crust
$(D)$ Oxidation of nitrates is possible in soil
$2.$ Among the following, the correct statement is
$(A)$ Between $\mathrm{NH}_3$ and $\mathrm{PH}_3, \mathrm{NH}_3$ is better electron donor because the lone pair of electrons occupies spherical ' $\mathrm{s}$ ' orbital and is less directional
$(B)$ Between $\mathrm{NH}_5$ and $\mathrm{PH}_5, \mathrm{PH}_5$ is better electron donor because the lone pair of electrons occupies $\mathrm{sp}^3$ orbital and is more directional
$(C)$ Between $\mathrm{NH}_3$ and $\mathrm{PH}_3, \mathrm{NH}_3$ is a better electron donor because the lone pair of electrons occupies $\mathrm{sp}^3$ orbital and is more directional
$(D)$ Between $\mathrm{NH}_3$ and $\mathrm{PH}_3, \mathrm{PH}_3$ is better electron donor because the lone pair of electrons occupies spherical ' $\mathrm{s}$ ' orbital and is less directional
$3.$ White phosphorus on reaction with $\mathrm{NaOH}$ gives $\mathrm{PH}_3$ as one of the products. This is a
$(A)$ dimerization reaction
$(B)$ disproportionation reaction
$(C)$ condensation reaction
$(D)$ precipitation reaction
Give the answer question $1,2$ and $3.$
$\begin{array}{*{20}{c}}
H\\
|\\
{ClHC = HC - C - CH = CHCl}\\
|\\
{Cl}
\end{array}$
${image}$
The correct plot for $3\, s$ orbital is
${Image}$ Choose the correct answer from the following options