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प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
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उत्तर
When carbon dioxide is passed through limewater, it turns milky due to the formation of calcium carbonate (CaCO3)
Explanation:
Calcium carbonate is formed when carbon dioxide reacts with the calcium hydroxide in lime water, causing it to have a milky appearance.
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संबंधित प्रश्न
How do the following help in bringing about a chemical change?
heat.
MATCH THE COLUMNS
| 1 . `H_2` + `CI_2` `→` 2HCI | a. displacement reaction |
| 2. `2FeCI_3`+ `H_2` `→` `2FeCI_2` +2HCI` | b. addition of an electronegative redical |
| 3. Fe + `CuSO_4` `→``FeSO_4` +Cu` | c. removal of an electronegative redical |
| 4. `2H_2O` +`4NO_2`+`O_2` `→` `4HNO_3` | d.reduction by adding hydrogen |
| 5. 3Fe +`3CI_2` `→` `2FeCI_3` | e.electrolysis of water |
| 6. `FeCI_3`+ 3NaOH `→``Fe(OH)_3``↓`+NaCI | F.double decomposition,precipitation reaction |
| 7.`2H_2O` `→` `2H_2``↑`+`O_2` | e. combination or synthesis reaction |
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Oxygen is a ______ in respiration.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
______ gas causes tears in our eyes while cutting onions.
Mention the various conditions required for a chemical reaction to occur.
Both CO2 and H2 gases are ______.
Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.
