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प्रश्न
What happens when sodium metal is heated in the free supply of air?
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उत्तर
On being heated in air, sodium reacts vigorously with oxygen to form sodium peroxide. The chemical equation involved in the reaction is:
\[\ce{2Na_{(s)} + O_{2(s)} -> Na_2O_{2(s)}}\]
संबंधित प्रश्न
Find the oxidation state of sodium in Na2O2.
Discuss the various reactions that occur in the Solvay process.
Describe two important uses of the following sodium carbonate.
State as to why a solution of Na2CO3 is alkaline?
Write a balanced equation for the reaction between Na2O2 and water.
When Zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?
(i) H+ ions
(ii) Mg2+ ions
(iii) Ca2+ ions
(iv) \[\ce{SO^{2-}4}\] ions
Complete the following reactions.
\[\ce{O^{2-}2 + H2O ->}\]
Complete the following reactions.
\[\ce{O^{-}2 + H2O ->}\]
Match the compounds given in Column I with their uses mentioned in Column II.
| Column I | Column II |
| (i) CaCO3 | (a) Dentistry, ornamental work |
| (ii) Ca(OH)2 | (b) Manufacture of sodium carbonate from caustic soda |
| (iii) CaO | (c) Most negative E value among alkali O metals. |
| (iv) CaSO4 | (c) Manufacture of high-quality paper |
| (d) Used in white washing |
Match the elements given in Column I with the colour they impart to the flame given in Column II.
| Column I | Column II |
| (i) Cs | (a) Apple green |
| (ii) Na | (b) Violet |
| (iii) K | (c) Brick red |
| (iv) Ca | (d) Yellow |
| (v) Sr | (e) Crimson red |
| vi) Ba | (f) Blue |
\[\ce{NaOH}\] is manufactured by the electrolysis of brine solution. The products of the reaction are ______.
Which of the following metal hydroxides does not dissolve in sodium hydroxide solution?
Amongst baking soda, caustic soda and washing soda, carbonate anion is present in ______.
The pair of compounds which cannot exist together in solution is ______.
