Chemistry Question Bank

The stability of the hydrides of oxygen, sulphur, selenium and tellurium decreases in the order

Which of the following statements regarding sulphur is incorrect?

The number of lone pairs and the number of S—S bonds in S₈ molecules are respectively:

Which of the following has pπ – dπ bonding ? (a) NO (b) SO (c) BO (d) CO

In ozone, the central oxygen atom uses

Ozone is prepared by the action of silent electric discharge upon oxygen in an apparatus called ozonizer. The reaction

Ozonized oxygen is a mixture of

Which of the following statements is correct?

Ozone is an extremely powerful oxidizing agent. It is

At room temperature, O₃ is absorbed by

The gases absorbed by alkaline pyrogallol and oil of cinnamon are respectively

In the presence of water, sulphur is oxidized by ozone to give

A green coloured solution of a salt changes its colour to light pink on passing ozone through it. Which of the following species represent pink and green colour respectively ?

O₃ cannot oxidise:

Which of the following is/are correct?

In the cyclo-S₈ molecule of rhombic sulphur, all the S—S bond lengths and all the S—S—S bond angles are respectively (approximate values)

H₂S turns an acidified K₂Cr₂O₇ solution

H₂S turns an acidified KMnO₄ solution

Which of the following compounds is thermodynamically unstable?

H₂S is less stable than H₂O because

Sulphur dioxide reacts with chlorine in the presence of charcoal (which acts as a catalyst) to give

Which of the following gases may act both as an oxidizing and a reducing agent?

Dehydration of concentrated H₂SO₄ in the presence of P₄O₁₀ produces

H₂SO₄ is manufactured from SO₂(g) by the

Which of the following ions does not have an S—S linkage?