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प्रश्न
Distinguish by dilute sulphuric acid.
Copper and magnesium?
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उत्तर
| Copper | Magnesium |
| Copper does not react with dilute sulphuric acid as its reduction potential is higher than that of hydrogen. | Magnesium metal dissolves readily in dilute sulphuric acid to form solutions containing the aquated Mg(II) ion together with hydrogen gas, H2. |
| Copper does not displace hydrogen from non-oxidising acids like HCl or dilute H2SO4. | Corresponding reactions with other acids such as hydrochloric acid also give the aquated Mg(II) ion. |
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Fill in the blank
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Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
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Lead nitrate.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
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Classify the following processes into physical or chemical changes:
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- Digestion of food.
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Reason (R): Physical changes are always reversible.
