Chemistry Question Bank

Which of the following compounds consists of a P–P linkage?

The number of P–O–P bonds in the structure of phosphorus pentoxide and phosphorus trioxide are respectively (2005)

In which of the following species, S-atom assumes sp3 hybrid state? (I) SO₃ (II) SO₂ (III) H₂S (IV) S₈

Oxygen is more electronegative than sulphur, yet H₂S is acidic in nature while H₂O is neutral because:

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