Hydrogen

The equilibrium molecular structure of hydrogen peroxide is :

• Planar as given below

  

• linear

• tetrahedral

• non-planar

.... process is used for the removal of hardness of water.

• Calgon

• Baeyer

• Serpeck

• Hoope

What is the gas liberated when alkaline formaldehyde solution is treated with H₂O₂?

• CO₂

• O₂

• CH₄

• H₂

The products formed when heavy water is reacted with magnesium nitride, are

• NH₃, Mg(OH)₂

• NH₃, Mg(OD)₂

• ND₃, Mg(OH)₂

• ND₃, Mg(OD)₂

Sulphur trioxide is dissolved in heavy water to form a compound X. The hybridisation state of sulphur in X is :

• sp²

• sp³

• sp

• dsp²

Which one of the following reactions does not form gaseous product?

• PbO₂ + H₂O₂ →

• Acidified KMnO₄ + H₂O₂ →

• PbS + H₂O₂ →

• Cl₂ + H₂O₂ →

Assertion (A) : NaCl is less soluble in heavy water than in ordinary water.

Reason (R) : Dielectric constant of ordinary water is more than that of heavy water.

The correct answer is:

• Both (A) and (R) are true and (R) is the correct explanation of (A)

• Both (A) and (R) are true but (R) is not the correct explanation of (A)

• (A) is true, but (R) is not true

• (A) is not true, but (R) is true

Which one of the following reactions represents the oxidising property of H₂O₂?

• 2KMnO₄ + 3H₂SO₄ + 5H₂O₂ → K₂SO₄ + 2MnSO₄ + 8H₂O + 5O₂

• 2K₃[Fe(CN)₆] + 2KOH + H₂O₂ → 2K₄[Fe(CN)₆] + 2H₂O + O₂

• PbO₂ + H₂O₂ → PbO + H₂O + O₂

• 2KI + H₂SO₄ + H₂O₂ → K₂SO₄ + I₂ + 2H₂O

The correct order of reactivity of hydrogen halides with ethyl alcohol is

• HF > HCl > HBr > HI

• HCl > HBr > HF > HI

• HBr > HCl > HI > HF

• HI > HBr > HCl > HF

The orange coloured compound formed when H₂O₂ is added to TiO₂ solution acidified with conc. H₂SO₄ is

• Ti₂O₃

• H₂Ti₂O₈

• H₂TiO₃

• H₂TiO₄