22 May Chemistry Tuition Q
7) Aqueous hydrogen peroxide is used to sterilise contact lenses. At room temperature, aqueous hydrogen peroxide decomposes very slowly to form water and oxygen. The decomposition can...
7) Aqueous hydrogen peroxide is used to sterilise contact lenses. At room temperature, aqueous hydrogen peroxide decomposes very slowly to form water and oxygen. The decomposition can...
a) (i) Give evidence from the diagram which demonstrates that the above reaction is exothermic. ……………………………………………………………………………………………… (ii) Construct the balanced chemical equation for the above reaction....
(a) Suggest why boron nitride with structure A can be used as a lubricant. ...
Several small pieces of magnesium are placed on a block of solid carbon dioxide. The solid carbon dioxide is at a temperature of -60 °C. The...
2 . Sorrel is a small green plant.
(a) The pigments in the sorrel leaf can be separated by chromatography.
(i) Describe how chromatography can...
Although certain bacteria in the soil convert nitrogen gas into nitrates, other bacteria convert nitrogen into ammonium salts. The ionic equation for this second reaction is N2...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
We are back with a very interesting story in your chemistry tuition. Every one of you must have seen candles burning. Ever wondered where the wax...
A1. Choose from the list, the substance that best fit the description. You may use the substance only once. ...
Hydrogen peroxide can behave as an oxidizing agent and reducing agent. Study the observations given in the table below and deduce whether hydrogen peroxide functions as...
Hydrogen reacts with chlorine to make hydrogen chloride. The reaction is exothermic. The reaction can be represented by the equation below....
The figure below describes reactions involving aqueous ammonia...
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