Salts and Solutions - Class XI
General chemistry of salts, solutions, hydrolysis, and salt properties
Questions
Question 1 Multiple Choice (Single Answer)
The phenomenon of crumbling to powder of sodium carbonate crystals on exposure to air is known as :
- deliquescence
- isomorphism
- efflorescence
- none of the above
Question 2 Multiple Choice (Single Answer)
Many salts absorb water from the atmosphere. This property is called :
- hydration
- dehydration
- deliquescence
- efflorescence
Question 3 Multiple Choice (Single Answer)
The loss of water of crystallization to the atmosphere by a compound is termed:
- deliquescence
- dehydration
- efflorescence
- hydrolysis
Question 4 Multiple Choice (Multiple Answers)
Which of the following are efflorescent substances?
- $Cu{SO} _{4}.5{H} _{2}O$
- ${Na} _{2}{CO} _{3}.10{H} _{2}O$
- ${K} _{2}{SO} _{4}.{Al} _{2}{({SO} _{4})} _{3}.24{H} _{2}O$
- ${({NH} _{4})} _{2}{SO} _{4}$
Question 5 Multiple Choice (Single Answer)
$Na _2CO _3.10H _2O \longrightarrow Na _2CO _3.H _2O$
The given reaction is an example of:
- efflorescent substance
- deliquescent substance
- hygroscopic substance
- none of the above
Question 6 Multiple Choice (Single Answer)
Which of the following substances can be used for drying gases?
- Calcium carbonate
- Sodium carbonate
- Sodium bicarbonate
- Calcium oxide
Question 7 Multiple Choice (Single Answer)
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through two guard tube containing calcium chloride. The role of calcium chloride in the guard tube is:
- it absorbs the evolved gas
- it moisten the gas
- it absorbs moisture from the gas
- it absorbs $Cl^-$ ions form the gas evolved