Permanent hardness of water is due to the presence of calcium & magnesium
Bi-carbonates
Sulphates & chlorides
Carbonate
None of these
- Silicon carbide is a/an
- Which of the following is not a food additive?
- Styrene (a monomer for the production of polystyrene) is commercially produced by
- Dehydrogenation of Isopropanol produces
- Pure rectified spirit contains about __________ percent alcohol.
- Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
- Phenol formaldehyde is produced by condensation polymerisation. It is also known as
- Soap cannot be used with hard water, because
- For the hydrogenation of oils, __________ (i) __________ is commonly used as catalyst and __________…
- Haemoglobin is a/an
- Zeigler process
- In the manufacture of viscose rayon, the raw material used industrially is
- Dacron is a/an
- Phthalic anhydride is used
- Chloramines are used in water treatment for
- DDT should not be allowed to come in contact with iron (during its manufacture) to
- Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst…
- Pick out the wrong statement.
- Lubricating greases are a mixture of
- In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations…
- Concentration of hydrogen peroxide is done by
- The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
- The most widely used coagulant for removing suspended impurities from water is
- Cumene is the starting material for the production of
- Which of the following is an explosive?
- Which of the following is an ore of iron?
- Salt is added in the kettle during soap manufacture to separate
- Vanillin is a type of
- The major constituents of glass are
- Polycaprolactam is commercially known as