Read the passage and answer any four questions:
An element as a basic form of matter that cannot be broken down into simpler substances by chemical reactions. Elements can be normally divided into metals, non-metals and metalloids. Examples of metals are gold, silver, copper etc. Examples of non-metals are hydrogen, oxygen, iodine etc. Some elements have intermediate properties between those of metals and non-metals, they are called metalloids. A compound is a substance composed of two or more elements, chemically combined with one another in a fixed proportion. The material obtained by the group I is a mixture of the two substances. The properties of the mixture are the same as that of its constituents.
The colourless gas with the smell of rotten egg is found in
group I
group II
group III
group IV
The constituent of compounds are separated by
chemical reaction
electrochemical reaction
both (a) and (b)
none of these
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Answer:
hydrogen sulphide is flammable and it is colour and smell like rotten eggs
It React in high Temperature presence of catalyst
sulfur dioxide react with hydrogen sulfide
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