Advertisements
Advertisements
प्रश्न
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 |
उत्तर
| Column I | Column II |
| (i) CaCO3 | (c) Manufacture of high-quality paper |
| (ii) Ca(OH)2 | (d) Used in white washing |
| (iii) CaO | (b) Manufacture of sodium carbonate from caustic soda |
| (iv) CaSO4 | (a) Dentistry, ornamental work |
Explanation:
(i) CaCO3 is used in manufacturing of high-quality paper.
(ii) Due to the disinfectant nature of Ca(OH)2 is used in white wash.
(iii) CaO is used in the manufacture of sodium carbonate from caustic soda.
(iv) CaSO4 is used in dentistry, ornamental work and for making statues.
APPEARS IN
संबंधित प्रश्न
State as to why a solution of Na2CO3 is alkaline?
Write a balanced equation for the reaction between Na2O2 and water.
Amphoteric hydroxides react with both alkalies and acids. Which of the following Group 2 metal hydroxides is soluble in sodium hydroxide?
A chemical A is used for the preparation of washing soda to recover ammonia. When CO2 is bubbled through an aqueous solution of A, the solution turns milky. It is used in whitewashing due to disinfectant nature. What is the chemical formula of A?
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.
\[\ce{O^{-}2 + H2O ->}\]
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?
Which sodium salt will be heated with soda lime to obtain propane?
