Group 13 to 18 elements: general introduction, electronic configuration, occurrence, oxidation states, trends in physical and chemical properties; preparation, properties and uses of compounds — boron family (borax, boric acid, diborane), carbon family (allotropes, oxides of carbon, silicates), nitrogen family (NH3, HNO3, oxides of nitrogen), oxygen family (O3, H2SO4), halogens (HCl, oxoacids, interhalogens), noble gases (xenon compounds).
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Q1 · p-Block Elements (Groups 13-18) · EASY
Which of the following statements about the acidic nature of the oxides of Group 13 elements is correct?
Q2 · p-Block Elements (Groups 13-18) · MEDIUM
Diborane (B2H6) reacts with ammonia (NH3) at different temperatures to give different products. At lower temperature it forms an addition compound, while at higher temperature it gives borazine. What is the molecular formula of borazine?
Q3 · p-Block Elements (Groups 13-18) · MEDIUM
Which of the following statements about the acidic strength of oxoacids of halogens is correct?
Q4 · p-Block Elements (Groups 13-18) · MEDIUM
In the contact process for manufacturing sulphuric acid, sulphur dioxide is oxidized to sulphur trioxide using oxygen in the presence of V2O5 as catalyst. What is the favourable temperature range for maximum yield of SO3, considering the reaction 2SO2 + O2 ⇌ 2SO3 is exothermic?
Q5 · p-Block Elements (Groups 13-18) · HARD
Xenon hexafluoride (XeF6) is one of the most reactive xenon fluorides. It undergoes hydrolysis in different ways depending on the amount of water present. When XeF6 undergoes complete hydrolysis with excess water, what are the final products?