Question

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 1

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