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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements3 Marks
Question
  1. Why does water transported through lead pipes become poisonous?
  2. When formic acid reacts with conc $\text{H}_2\text{SO}_2$, what will happen? Write chemical equation?
  3. Name the allotrope of carbon which is isomorphous (same structure) with crystalline silicon.
✓

Answer

  1. It is due to formation of lead hydroxide which makes the water poisonous.
  2. Carbon monoxide is formed.
$\text{HCOOH}\xrightarrow{\ \ \ \ \text{conc. H}_2\text{SO}_4\ \ \ \ }\text{H}_2\text{O}+\text{CO}$
  1. Silicon crystals have same octahedral structure as diamond in which each 'C' is linked to four carbon like silicon.

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