Chemistry Past Questions and Answers

Chlorophyll obtained from given leaves of plant can be shown to be composed of more than one coloured component by the technique of

Chlorophyll obtained from given leaves of plant can be shown to be composed of more than one coloured component by the technique of

In countries where the temperature falls below 273K, salt is always sprinkled on the icy road in order to

2Na_(s) + 2H₂O_(l) → 2NaOH_(aq) + H_2(g)
From the equation above, calculate the mass of sodium hydroxide produced by 2.3g of sodium.
[H = 1, O = 16, Na = 23]

16.8 g of sodium hydrogen trioxocarbonate (IV) is completely decomposed by heat. Calculate the volume of carbon(IV) oxide given off s.t.p
[Na 23, C = 12, O = 16, H = 1, Molar volume of a gas at s.t.p = 22.4 dm³]