Chemistry Question Bank

Acidity of diprotic acids in aqueous solutions increases in the order (CBSE AIPMT 2014)

The correct arrangement of following acids of phosphorus in the increasing order of oxidation state of phosphorus is (Guj CET 2014)

The species that is not hydrolysed in water is (KCET 2014)

The statement that is not correct is (KCET 2014)

Bleaching powder loses its power on keeping for a long time because (KCET 2013)

The compound represents phosgene is (Manipal 2013)

The increases order of reducing power of halogen acid is (Manipal 2013)

Aqueous solutions of hydrogen sulphide and sulphur- dioxide when mixed together, yield (KCET 2013)

The correct order of relative acidity is (UP CPMT 2013)

Which one among the following is the most powerful oxidizing agent?

Which of the following halogens has only one oxidation state of –1 in an aqueous solution?

Which of the following elements can have both positive and negative oxidation states?

A gas that cannot be collected over water is

Standard sodium thiosulphate solution is used in the estimation of iodine present in a solution. The equivalent weight of sodium thiosulphate which is required to make the standard solution is

H2S turns an acidified KMnO4 solution

H2S turns an acidified K2Cr2O7 solution

Which of the following statements is correct for sulphur?

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)

Which of the following is/are correct?

O3 cannot oxidise:

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 ?

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

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

At room temperature, O3 is absorbed by

Ozone is an extremely powerful oxidizing agent. It is