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This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
1. |
If a sample water has not supplied any heat and having impurities as follows: Mg(HCO3)2=50 mg of CaCO3, MgSO4 = 100mg of CaCO3, CaCl2=200mg of CaCO3, Ca(NO3)2=100mg of CaCO3. Calculate the lime required for treatment of 10000 litres of water. |
A. | 1.82Kg |
B. | 1.50Kg |
C. | 1.45Kg |
D. | 1.48Kg |
Answer» E. | |
2. |
100 parts of CaCO3 is equivalent to the __________ parts of sodium carbonate. |
A. | 103 |
B. | 104 |
C. | 105 |
D. | 106 |
Answer» E. | |
3. |
We know that lime required for softening of water is x{temp Ca hardness + 2.Mg hardness + perm(Mg+Fe+3Al)hardness + 1/2 HCL + H2SO4 NaAlO2 CO2}-all are in terms of mg of CaCO3. Here x=? |
A. | 7.4 |
B. | 0.74 |
C. | 74 |
D. | 740 |
Answer» C. 74 | |
4. |
50 ml of standard and hard water containing 1mg of pure CaCO3 per ml consumed 10ml of EDTA solution. 50ml of given EDTA sample requires 10ml of same EDTA solution. Calculate the total hardness of water sample in ppm. |
A. | 10ppm |
B. | 100ppm |
C. | 1000ppm |
D. | 10000ppm |
Answer» D. 10000ppm | |