Recent questions in Chemistry

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The diagram below shows the relationship between the physical states of matter.

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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The curves below represent the variation of temperature with time when pure and impure samples of a solid were heated separately.

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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In an experiment 3.36g of iron fillings were added to excess copper (II) sulphate. Calculate the mass of copper that was deposited. (CU= 63.5, Fe = 56)

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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The structure of two molecules of water can be represented as shown below.

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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Give two applications of chromatography?

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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What is paper chromatography?

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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A piece of burning magnesium ribbon was plunged into a gas jar containing sulphur (IV) oxide.

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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GSTRU and P belong to the same period in the periodic table. The ions formed by the atoms are as below:-

asked Jul 27, 2021 in Chemistry Form 2 by anonymous

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Name the process which take place when white sugar changes to black solid when mixed with excess concentrated sulphuric acid.

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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Name the process which take place when Fe2+ changes to Fe3+

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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Name the process which take place when Iodine changes directly from solid to gas

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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Chlorine gas was bubbled through a solution of potassium iodide in boiling tube.

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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An element X is represented as 1840X (X = is not the actual symbol of the element)

asked Jul 27, 2021 in Chemistry Form 2 by anonymous

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State one way in which the strength of a base or an acid can be determined in the laboratory.

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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The diagram below illustrates an experiment set up to investigate the effect of heat on copper (II) carbonate. Study it and answer the questions that follow.

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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State the importance of oxygen in cutting metals

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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Complete the table below to show pairs of substances used to prepare oxygen.

asked Jul 27, 2021 in Chemistry Form 1 by anonymous

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An experiment was set up as shown below.

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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Metal R does not react with an oxide of metal S. Metal T reacts with an oxide of metal S. metal Q reacts with an oxide of T. Arrange the metals in increasing order of reactivity.

asked Jul 27, 2021 in Chemistry Form 4 by anonymous

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The table below shows isotopes and their percentage abundances.

asked Jul 27, 2021 in Chemistry Form 4 by anonymous

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