When iron nails are dropped in a copper sulphate solution, then ____.
Correct!
Wrong!
When iron nails are dropped in copper sulphate the blue colour changes to green. Iron, being more reactive than copper displaces copper from the copper sulphate solution.
Which of the following is not a decomposition reaction?
Correct!
Wrong!
In the process of photosynthesis carbon dioxide and water combine to form starch, hence, it is a combination reaction.
In a precipitation reaction, one of the products formed is ____.
Correct!
Wrong!
In a precipitation reaction, aqueous solution of two salts react and one of the products formed is a precipitate, which is an insoluble salt.
ICSE Class 9th Chemistry - Chemical changes and reactions MCQs
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