Recent questions in Chemistry

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In an experiment, a test-tube full of chlorine water was inverted in chlorine water as shown in the diagram below and the set up left in sunlight for one day.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

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

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Samples of urine from three participants F, G and H at an international sports meeting were spotted onto a chromatography paper alongside two from illegal drugs A1 and A2. A chromatogram was run using methanol. The figure below shows the chromatogram.

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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State two uses of hydrogen gas

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Hydrogen gas was prepared in the lab. Using the following set up

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

Define the following terms: Electron affinity

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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2 answers

Define the following term: Ionization energy

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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Define the following term: Isotope

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Give four reasons why most apparatus are made of glass

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Identify the following apparatus and give a use for each

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Define the following: Ion

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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Define the following:

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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Give the valency of each of the elements or radical in the following chemical compounds.

asked Aug 4, 2021 in Chemistry Form 2 by anony mous

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The table below gives the number of protons and neutrons in element G,H,I and J.

asked Aug 4, 2021 in Chemistry Form 2 by anony mous

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Some moist iron wool was placed in a test tube and the tube inverted and placed in a beaker containing water. The apparatus was left for one week .It was observed that the iron wool had rusted and the water level had raisen.No further change took place when the set-up was left for more days even though not all the iron rusted.

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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Study the information in the table below and answer the questions that follow: The letters do not represent the actual symbol of the element).

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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1 answer

When Chlorine gas was bubbled through water the resulting solution act as a bleaching agent

asked Aug 4, 2021 in Chemistry Form 3 by anony mous

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1 answer

Write a balanced equation for the reaction between Magnesium and Steam

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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When potassium Nitrate is heated, it produces potassium Nitrate and gas X

asked Aug 4, 2021 in Chemistry Form 3 by anony mous

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Air was passed through several reagents as shown in the flow chart below

asked Aug 4, 2021 in Chemistry Form 1 by anony mous

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