Advertisements
Advertisements
प्रश्न
Which of the following statements is true about Ca(OH)2?
पर्याय
It is used in the preparation of bleaching powder.
It is a light blue solid.
It does not possess disinfectant property.
It is used in the manufacture of cement.
उत्तर
It is used in the preparation of bleaching powder.
Explanation:
Calcium hydroxide is used in the preparation of bleaching powder. It reacts with chlorine to form hypochlorite, a constituent of bleaching powder.
\[\ce{Ca(OH)2 + Cl2 -> CaCl2 + H2O + Ca(OCl)2}\]
It is a white amorphous powder and is sparingly soluble in water.
It possess disinfectant property and therefore, is used in white ash.
Cement is made from calcium oxide and the addition of other material such as clay, silica.
APPEARS IN
संबंधित प्रश्न
Describe two important uses of the following quicklime.
Describe the importance of the limestone.
Describe the importance of the plaster of paris.
Dead burnt plaster is ______.
A substance which gives brick red flame and breaks down on heating to give oxygen and a brown gas is ______.
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
A substance absorbs \[\ce{CO2}\] and violently reacts with water. That substance is ______.
The conversion of hydroxyapatite occurs due to presence of p - ions in water. The correct formula of hydroxyapatite is ______.
\[\ce{Y <-[\Delta, 205°C] CaSO4.2H2O ->[\Delta, 120°C] X}\]
X and Y are respectively:
The commercial name for calcium oxide is ______.
