You are provided with one solid: solid $$\(\mathbf{E}\)$$. Do the following tests on solid $$\(\mathbf{E}\)$$, recording all of your observations at each stage. Tests on solid E Divide solid $$\(\mathbf{E}\)$$ into two approximately equal portions in two boiling tubes. To the fourth portion of solution $$\(\mathbf{E}\)$$, add about 1 cm depth of dilute nitric acid and a few drops of aqueous barium nitrate. Leave the mixture to stand for about two minutes. Record your observations. ................................................................................................................................................ . ..........................................................................................................................................

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