Boron and silicon of very high purity can be obtained through

The correct order of the first ionization enthalpies is :

Reaction of ammonia with excess Cl2 gives

The highest possible oxidation states of uranium and plutonium, respectively, are :

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means

The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ____________ .

The reaction in which the hybridisation of the underlined atom is affected is

$$ \begin{aligned} & \underline{\mathrm{A}} \xrightarrow{4 \mathrm{KOH}, \mathrm{O}_2} \underset{(\text { Green })}{2 \mathrm{~B}}+2 \mathrm{H}_2 \mathrm{O} \\ & \underline{3 \mathrm{~B}} \xrightarrow{4 \mathrm{HCl}} \underset{\text { (Purple) }}{2 \mathrm{C}}+\mathrm{MnO}_2+2...

White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound (X). (X) on acidification with HCl gives...