1996 年

In an experiment, 1.6 g of sulphur is burnt completely in air to form sulphur dioxide. What volume of sulphur dioxide, measured at room temperature and pressure, is formed ? (Relative atomic mass : S = 32.0; Molar volume of gas at room temperature and pressure = 24.0 dm³)

Consider the following experiment :

After the experiment, the residue in the combustion tube is dissolved in water and an alkaline solution is obtained. X may be

Which of the following substances is NOT derived from petroleum ?

One mole of each of the following compounds is burnt completely in oxygen. Which compound requires the greatest volume of oxygen, measured at the same temperature and pressure, for complete combustion ?

Which of the following substances, when mixed, will undergo a reaction ?

Which of the following methods can be used to separate the colourings in brown chocolate beans ?

A gardener bought a bag of potassium nitrate and a bag of ammonium sulphate, to be used as fertilisers. He forgot to label the bags. Which of the following tests would enable him to distinguish between the two chemicals ?

When a little detergent is added to a drop of water on a piece of woollen cloth as shown above, the drop spreads. Which of the following statements correctly explains this observation ?

Under certain conditions, 60 cm³ of a gaseous compound, NₓOᵧ, decompose completely to give 60 cm³ of nitrogen gas and 30 cm³ of oxygen gas. (All gas volumes are measured at the same temperature and pressure.) Which of the following combinations is correct ?

Which of the following methods can be used to minimise the air pollutant mentioned ?