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प्रश्न
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 |
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उत्तर
| Column I | Column II |
| (i) Cs | (f) Blue |
| (ii) Na | (d) Yellow |
| (iii) K | (b) Violet |
| (iv) Ca | (c) Brick red |
| (v) Sr | (e) Crimson red |
| vi) Ba | (a) Apple green |
Explanation:
(i) Caesium imparts blue color when introduced into flame.
(ii) Sodium imparts yellow color when introduced into flame.
(iii) Potassium imparts violet color when introduced into flame.
(iv) Calcium imparts brick red color when introduced into flame.
(v) Strontium imparts crimson red color when introduced into flame.
(vi) Barium imparts apple green color when introduced into flame.
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संबंधित प्रश्न
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(i) H+ ions
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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 |
\[\ce{NaOH}\] 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?
The pair of compounds which cannot exist together in solution is ______.
Which sodium salt will be heated with soda lime to obtain propane?
