☰
✕

The p-Block Elements
Question
Wired Faculty App

The wooden shelf under the reagent bottle containing concentrated H2SO4 blacken after somtime. Why?

Answer

Conc. H2SO4 being a strong dehydrating agent thus having extreme attraction for water, and it can pull the hydrogen and oxygen out of the wood (cellulosic material) leaving behind black carbon.

Sponsor Area

Some More Questions From The p-Block Elements Chapter

Write a balanced equation for the hydrolytic reactions PCl5 in heavy water.

What is the basicity of H3PO4?

What happens when H3PO3 is heated?

List the important source of sulphur.

Write the order of thermal stability of the hydrides of Group 16 elements.

Why is H2O a liquid and H2S a gas?

Which of the following does not react with oxygen directly?
Zn, Ti, Pt, Fe

Complete the following reactions
(i) C2H4 + O2 →
(ii) 4Al + 3O2 →

Why does O3 act as a powerful oxidising agent?

How is O3 estimated quantitatively?