A. Bicarbonates & sulphates of calcium and magnesium
B. Undesirable taste and odour
C. Bacteria
D. Its corrosiveness
Correct Answer: Bicarbonates & sulphates of calcium and magnesium ✔
Last Updated: February 14, 2019
Related MCQs
- Air used in aerobic fermentation must be sterilized, otherwise the __________?
- Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used__________?
- Prussian blue is chemically represented by__________?
- Molasses is the starting material for the production of __________ ?
- Insulin is an __________ drug?
- Solvay process as compared to dual process (i.e. modified Solvay process) ?
- The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is __________?
- Pure rectified spirit contains about __________ percent alcohol?
- Styrene is produced from ethyl benzene by the process of__________?
- White phosphorous is stored under water, because __________?
- Paper pulp produced by Kraft/sulphate process is__________ ?
- Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C ?
- Oxidation of SO2 to SO3 is favoured by__________?
- Which of the following contains least amount of N2 ?
- Which of the following is not responsible for causing permanent hardness of water ?
- Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
- __________ are used as corrosion inhibitor for iron & steel in aqueous solutions ?
- Fusion of bauxite and __________ produces high alumina cement?
- The basic constituent of vegetable oils is __________?
- In sulphate pulp manufacture, the pressure and temperature in the digestor is__________?
- Glass is__________?
- Sulphur addition in soap is done to __________?
- Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction ?
- Esterification reaction produces __________?
- Haemoglobin is a/an__________?
- Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C ?
- Hydrophilic group of a soap or detergent solution is__________?
- The chamber process is__________?
- Sand and __________ is fused at 1300°C, to produce sodium silicate ?
- The main use of HCl is in the__________?
- High purity nitrogen is used in__________?
- Percentage of glycerine present in the spent lye obtained during soap manufacture is about__________?
- Which of the following is an unsaturated fatty acid ?
- Iron ore hematite is concentrated using __________?
- The most widely used coagulant for removing suspended impurities from water is__________?
- Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?
- Flexible foam (for mattresses) is usually made of__________?
- Thermoplastic materials__________?
- The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to__________?
- Main product in calcium carbide-water reaction is__________?
- The yield of tar from high temperature carbonisation of dry coal is about __________ percent?
- Permanent hardness of water can be removed by__________?
- Bitterns is a/an__________?
- Nylon-66 is so named because the__________?
- The main product of high temperature carbonisation of coal is__________?
- Salt is added in the kettle during soap manufacture to separate __________?
- Percentage of alcohol in beer may be around __________ percent?
- Fatty material used in soap making is __________?
- The main use of activated carbon in water treatment is to control __________?
- Separation of fresh water from sea water can be done by the __________ operation ?
- Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like__________?