Question

If the chemical formulae of the chlorides of an element E are $EC{l}_{3}andEC{l}_5,$ then the chemical formulae of its oxides will be

• A.
  $E_2{O}_{4}and{E}_2{O}_5$
• B.
  $E_2{O}_{3}and{E}_2{O}_6$
• C.
  $E_2{O}_{2}and{E}_3{O}_5$
  
• D.
  $E_2{O}_{3}and{E}_2{O}_5$

Answer 1

The correct option is D

$E_2{O}_{3}and{E}_2{O}_5$
Case I: Chemical formula of chloride of $E=EC{l}_3$

Valency of chlorine = 1

$\therefore$ Valency of E = 3

Case 2: Chemical formula of chloride of$E=EC{l}_5$
Valency of chlorine = 1
$\therefore$Valency of E = 5
Valency of Oxygen = 2



Thus, the chemical formulae of the oxides will be $E_2{O}_{3}and{E}_2{O}_5.$

Hence, the correct answer is option (d).