Recent questions in Chemistry Form 4

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3 answers

Use the standard electrode potentials for elements A, B, C, D and F given below to answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

When bromine is dissolved in water the equilibrium shown below is established.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

Explain why aqueous sodium chloride is not suitable as an electrolyte for the manufacture of sodium in the Downs process.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

Below is a simplified diagram of the Down’s cell used for the manufacture of sodium. Study it and answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

Electrode potentials for the half cells are shown below. Use the information to answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

An element F has a relative atomic mass of 88. When a current of 0.5 amperes was persed through the fused chloride of F for 20 minutes and 20 seconds, 0.278g of F were deposited at the cathode. Determine the charge on ion of F (1Faraday = 9650ºC).

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

What is a binary electrolyte.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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1 answer

Explain why concentrated Sulphuric (VI) acid is a poor electrolyte and has no effect on blue litmus paper whereas 2M Sulphuric (VI) acid conducts electricity and changes blue litmus paper red.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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2 answers

Give two properties of aluminum that makes it very suitable for making cooking utensils

asked Aug 4, 2021 in Chemistry Form 4 by anony mous

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1 answer

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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1 answer

The table below shows isotopes and their percentage abundances.

asked Jul 27, 2021 in Chemistry Form 4 by anonymous

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1 answer

Classify the following processes as either chemical or physical.

asked Jul 27, 2021 in Chemistry Form 4 by anonymous

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1 answer

Explain how the following substances conduct an electric current.

asked Jul 27, 2021 in Chemistry Form 4 by anonymous

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1 answer

Give the name of each of the following properties as described.

asked Jul 26, 2021 in Chemistry Form 4 by anony mous

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1 answer

The above is a simplified diagram of the Downs Cell used for the manufacture of sodium. Study it and answer the questions that follow.

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

The scheme below shows several reactions starting with propane. Study the scheme and answer the questions which follow.

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

Aqueous Copper (II) Sulphate was electrolyzed using the set up represented by the diagram below

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

In order to determine the molar heat of neutralization of potassium hydroxide, 200cm3 of 1M Hydrochloric acid and 200cm3 Of IM Potassium hydroxide both at the same initial temperature were mixed and stirred continuously with a thermometer. The temperature of the resulting solution was recorded after every 30 seconds until the highest temperature of the solution was attained. Thereafter, the temperature of the solution was recorded for a further two minutes.

asked Jul 8, 2021 in Chemistry Form 4 by anony mous

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1 answer

3g of 257Lr whose half-life is 8 days, remains after undergoing radioactive decay for 32 days. Find the original amount of substance.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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1 answer

The chief ore of aluminium is bauxite which mainly contains Al2O3.2H20. The ore is initially purified before aluminium is extracted electrolitically.

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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