Advertisements
Advertisements
प्रश्न
A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is ______.
पर्याय
Magnesium nitrate
Calcium nitrate
Barium nitrate
Strontium nitrate
उत्तर
A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is calcium nitrate.
Explanation:
\[\ce{2Ca(NO3)2 -> 2CaO + 4NO2 + O2}\]
NO2 is a brown gas. Ca2+ imparts brick red colour to the flame.
APPEARS IN
संबंधित प्रश्न
Describe two important uses of the following quicklime.
Describe the importance of the cement.
Which of the following statements is true about Ca(OH)2?
Several sodium compounds find use in industries. Which of the following compounds are used for textile industry?
(i) Na2CO3
(ii) NaHCO3
(iii) NaOH
(iv) NaCl
Match the elements given in Column I with the properties mentioned in Column II.
| Column I | Column II |
| (i) Li | (a) Insoluble sulphate |
| (ii) Na | (b) Strongest monoacidic base |
| (iii) Ca | (c) Most negative EΘ value among alkali metals. |
| (iv) Ba | (d) Insoluble oxalate |
| (e) 6s2 outer electronic configuration |
A substance absorbs \[\ce{CO2}\] and violently reacts with water. That substance is ______.
Initial setting of cement is mainly due to ______.
What are the products formed in sequence when excess of CO2 is passed in slaked lime?
The commercial name for calcium oxide is ______.
The substance not likely to contain CaCO3 is ______.
