Chemistry Past Questions and Answers

Which of the following species does not contain a co-ordinate bond?

14.8 g of a salt (z)dissolved in 250 cm³ of distilled water gives a concentration of 0.80 mol dm^-3. Calculate the molar mass of the salt (z).

How many atoms are there in one mole of hydrogen gas? [Avogadro's constant = 6.02 x 10²³mol^-1]

What is the IUPAC name of the compound represented by the molecular formula NaCIO₄?

When air is successively passed through sodium hydroxide solution, alkaline pyrogallol and then concentrated tetraoxosulphate (VI) acid, its remaining components are