Hydrogen

When sodium peroxide is treated with dilute sulphuric acid, we get

(i) Sodium sulphate and water

(ii) Sodium sulphate and oxygen

(iii) Sodium sulphate, hydrogen and oxygen

(iv) Sodium sulphate and hydrogen peroxide

Which of the following reactions increases production of Dihydrogen from synthesis gas?

(i) CH₄(g)+H₂O(g) → CO(g)+3H₂(g)

(ii)  C(g)+H₂O(g) → CO(g)+H₂(g)

(iii) CO(g)+H₂O(g) → CO₂(g)+H₂(g)

(iv) C₂H₆+2H₂O → 2CO+5H₂O

Hydrogen peroxide is _________.

(i) An oxidizing agent

(ii) A reducing agent

(iii) Both an oxidizing and a reducing agent

(iv) Neither oxidizing nor reducing agent.

Which of the following equations depicts the reducing nature of H₂O₂?

(i) 2[Fe(CN)₆]^4- + 2H⁺ + H₂O₂ → 2[Fe(CN)₆]^3- + 2H₂O

(ii) I₂ + H₂O₂ + 2OH^–→ 2I^-+ 2H₂O + O₂

(iii) Mn²⁺ + H₂O₂ → Mn⁴⁺ + 2OH

(iv) PbS + 4H₂O₂→ PbSO₄ + 4H₂O

Which of the following equations depict the oxidising nature of H₂O₂?

(i) 2MnO₄^- + 6H⁺ + 5H₂O₂ → 2Mn²⁺ + 8H₂O + 5O₂

(ii) 2Fe³⁺ + 2H⁺ + H₂O₂ → 2Fe²⁺ + 2H₂O + O₂

(iii) 2I^- + 2H⁺ + H₂O₂ → I₂+ 2H₂O

(iv) KIO₄ + H₂O₂→ KIO₃ + H₂O + O₂

The oxide that gives H₂O₂ on treatment with dilute H₂SO₄ is —

(i) PbO₂

(ii) BaO₂ .8H₂O + O₂

(iii) MnO₂

(iv) TiO₂

Consider the reactions

(A) H₂O₂ + 2HI → I₂ + 2H₂O

(B) HOCl + H₂O₂ → H₃O⁺ + Cl^– + O₂

Which of the following statements is correct about H₂O₂ with reference to these reactions? Hydrogen perioxide is ________.

(i) An oxidising agent in both (A) and (B)

(ii) An oxidising agent in (A) and reducing agent in (B)

(iii) A reducing agent in (A) and oxidising agent in (B)

(iv) A reducing agent in both (A) and (B)

Radioactive elements emit α, β and γ rays and are characterised by their halflives. The radioactive isotope of hydrogen is

(i) Protium

(ii) Deuterium

(iii) Tritium  

(iv) Hydronium

Which of the following hydrides is electron-precise hydride?

(i) B₂H₆

(ii) NH₃

(iii) H₂O

(iv) CH₄

Metal hydrides are ionic, covalent or molecular in nature. Among LiH, NaH, KH, RbH, CsH, the correct order of increasing ionic character is

(i) LiH > NaH > CsH > KH>RbH

(ii) LiH < NaH < KH < RbH < CsH

(iii) RbH > CsH > NaH > KH > LiH

(iv) NaH > CsH > RbH > LiH > KH