Crystals of Salts
Trending Questions
Q. The colour of the salt formed due to the removal of water crystals from hydrated copper sulphate upon heating is _________.
- orange
- white
- red
- green
Q.
Which of the following substance can be used to remove water of crystallization from Epsom salt MgSO4.7H2O?
Q.
Blue color X changes to white color Y on heating and when we moisten Y, Blue color X reappers. This is because has some water of crystallisation.
X has some water of crystallisation
None of the above
Q. If compound X is CuSO4.5H2O, how many water molecules are present in one formula unit of X?
- Four
- One
- Five
- Ten
Q.
How is crystallization better than evaporation? [3 MARKS]
Q. Blue coloured X changes to white colored Y on heating and in the presence of the moisture Y gives blue colored X. This is because ___.
- X is NaCl
- X is the bleaching powder
- X has some water of crystallization
- None of the above
Q. What is meant by water is crystallisation? Explain that the crystallisation salts contain water of crystallisation.
Q. Salt can be recovered from its solution by evaporation. Suggest some other technique for the same?
Q. Salt can be recovered from its solution by evaporation. Suggest some other technique for the same?
Q. Give a chemical test to distinguish between the following:
Sodium sulphate and ammonium sulphate.
Sodium sulphate and ammonium sulphate.
Q. Consider the following statements and arrange in the order of true/false as given in the codes.
S1:MgCl2.6H2O on heating gives Mg2OCl2(MgO.MgCl2) because of hydrolysis.
S2 : The softness of group I-A metals increases down the group with increasing atomic number.
S3 : Plaster of Paris is CaSO4.H2O
S4 : Sodium carbonate is made by solvay process but the same process is not extended to the manufacture of potassium carbonate.
- TTTF
- TFFT
- TTFT
- TTTT
Q.
Define efflorescence with suitable examples?
Q. How can we obtain table salt from a mixture of ammonium chloride, table salt and coarse sand?
A. Sublimation → Centrifugation
B. Sublimation → Sieving
C. Centrifugation → Sieving
A. Sublimation → Centrifugation
B. Sublimation → Sieving
C. Centrifugation → Sieving
Q. Crystallisation is better than evaporation because:
1. The solute may decompose at higher temperatures.
2. The solute may get charred to dryness upon heating.
3. The solute may contaminate the sample upon heating.
1. The solute may decompose at higher temperatures.
2. The solute may get charred to dryness upon heating.
3. The solute may contaminate the sample upon heating.
- All 1, 2 and 3 are true
- Only 1 and 2 are true
- Only 1 is true
- Only 3 is true
Q. The formula of common salt is
- MgCl2
- NaCl
- HCl
- CO2
