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प्रश्न
What do you see when concentrated nitric acid is added to copper?
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उत्तर
When concentrated nitric acid is added to copper brown fumes of nitrogen dioxide are observed.
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संबंधित प्रश्न
Name the products formed when dilute HNO3 is added to copper.
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Fill in the blank with appropriate word/words.
Ammonal is a mixture of ________ and __________
X, Y and Z are three crystalline solids that are soluble in water and have a common anion.
To help you to identify X, Y and Z, you are provided with the following experimental observations. Copy and complete the corresponding inferences in (a) to (e).
- A reddish-brown gas is obtained when X, Y and Z are separately warmed with concentrated sulphuric acid and copper turning added to the mixture.
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INFERENCE 2: The cation in X is either ______ or ______. - The action of heat on Y produces a reddish-brown gas and yellow residue which fuses with a glass of the test tube.
INFERENCE 3: The metal ion present in Y is the ______ ion. - When Z is heated, it leaves no residue. Warming Z with sodium hydroxide solution liberates a gas which turns moist red litmus paper blue.
INFERENCE 4: Z contains the ______ cation. - Write the equations for the following reactions:
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- The action of heat on Y.
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