The oxide which is not reduced by hydrogen is

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The reduction of metal oxides by hydrogen depends on the position of the metal in the electrochemical series. Metals that are more electropositive

Vedclass · Accepted Answer

$K_2O$

Vedclass · Answer

(B) The reduction of metal oxides by hydrogen depends on the position of the metal in the electrochemical series. Metals that are more electropositive than hydrogen (i.e.,have a more negative standard reduction potential) cannot be reduced by hydrogen. Potassium $(K)$ is a highly reactive metal with a very negative reduction potential,so $K_2O$ cannot be reduced by hydrogen. Conversely,oxides of metals like $Ag$ and $Fe$ can be reduced by hydrogen because they are less electropositive than hydrogen.

Similar Questions

Which one of the following substances is used in the laboratory for a fast drying of neutral gases?

Calcium cyanamide on treatment with steam under pressure gives ammonia and

Liquid ammonia is used for refrigeration because

Assertion $(A)$: $HCl$ gas is dried by passing through concentrated $H_2SO_4$.
Reason $(R)$: $HCl$ gas reacts with $NH_3$ that gives white fumes.

Which of the following orders is incorrect?

Vedclass Test Series

Exam Paper Generator

Online Exam Module