Class 7 Science Quiz e-Book PDF | Solutions App Download
Class 7 Science Study Material: Practice Test 7 (Chapter 22)
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The elements in air that are responsible for acid rain include
Some acids react and burn skin if they come in contact with it. They are
Nature of solute has an effect on its
The color of concentrated copper sulphate solution appears
Oranges and lemon are sour due to the presence of
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