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प्रश्न
Name one compound of calcium which is used for removing the colour of a coloured cloth.
उत्तर
Bleaching powder, or calcium oxychloride (CaOCl2), is used for removing the colour of a coloured cloth.
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संबंधित प्रश्न
Write the chemical name of bleaching powder and write its properties.
Which is the real bleaching agent present in bleaching powder?
State two uses each of the following compounds:
Chlorine
How is bleaching powder prepared? Write chemical equation of the reaction involved in the preparation of bleaching powder.
Which of the following is treated with chlorine to obtain bleaching powder?
(a) CaSO4
(b) Ca(OH)2
(c) Mg(OH)2
(d) KOH
Consider the following substance:
NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2
Which two substance combine to form bleaching powder?
Give a scientific explanation.
Bleaching powder has the odour of chlorine.
The reaction between MnO2 with HCl is depicted in the following diagram. It was observed that gas with bleaching abilities was released.
The chemical reaction between MnO2 and HCl is an example of:
Chlorine gas reacts with ____________ to form bleaching powder.
Assertion (A): Reaction of Quicklime with water is an exothermic reaction.
Reason (R): Quicklime reacts vigorously with water releasing a large amount of heat.
