ShowPer Page

Insoluble ferric oxide is produced in the pH range:

NETNUST Entry TestChemistryEnvironmental Chemistry

Suspended particles separate with gelatinous $Al(OH)_{3}$ ppt:

NETNUST Entry TestChemistryEnvironmental Chemistry

Commonly used coagulants are ions of:

NETNUST Entry TestChemistryEnvironmental Chemistry

Alum or aluminium sulphate used as coaglant in alkaline medium change into precipitate of radicals of aluminium:

NETNUST Entry TestChemistryEnvironmental Chemistry

Substance(s) used for disinfecting water is(are):

NETNUST Entry TestChemistryEnvironmental Chemistry

Chlorinating agent most commonly used in disinfection of water is now-a-days:

NETNUST Entry TestChemistryEnvironmental Chemistry

Pathogens in raw water are killed in step:

NETNUST Entry TestChemistryEnvironmental Chemistry

Water is made disinfectant during purification of water in the step:

NETNUST Entry TestChemistryEnvironmental Chemistry

Chemicals like $Al_{2}(SO_{4})_3$ or alum are used in purification of water during step:

NETNUST Entry TestChemistryEnvironmental Chemistry

Materials suspended in water or present as colloidal form in raw water are removed by:

NETNUST Entry TestChemistryEnvironmental Chemistry

Passing of air to remove foul gases, dissolved gasses, organosulfur compounds and volatile organic compounds is done in step:

NETNUST Entry TestChemistryEnvironmental Chemistry

Suspended matter is settled in purification of water by:

NETNUST Entry TestChemistryEnvironmental Chemistry

Underground or surface water is treated because it is:

NETNUST Entry TestChemistryEnvironmental Chemistry

Water is purified for:

NETNUST Entry TestChemistryEnvironmental Chemistry

Range of DO is (in ppm):

NETNUST Entry TestChemistryEnvironmental Chemistry

COD is termed for:

NETNUST Entry TestChemistryEnvironmental Chemistry

BOD is termed for:

NETNUST Entry TestChemistryEnvironmental Chemistry

DO abbreviation is used for:

NETNUST Entry TestChemistryEnvironmental Chemistry

The amount of potassium dichromate consumed during supply of oxygen to the organic compound dissolved in water is called:

NETNUST Entry TestChemistryEnvironmental Chemistry

The capacity of organic matter dissolved in water to consume oxygen with a period of five days is called:

NETNUST Entry TestChemistryEnvironmental Chemistry

The amount of oxygen dissolved in water to oxidize organic matter is called:

NETNUST Entry TestChemistryEnvironmental Chemistry

Quality of water is measured by the term:

NETNUST Entry TestChemistryEnvironmental Chemistry

Chromium VI is highly toxic causing disease of:

NETNUST Entry TestChemistryEnvironmental Chemistry

Leather tanneries cause water pollution by converting Cr VI-salts into a chromium with oxidation state:

NETNUST Entry TestChemistryEnvironmental Chemistry

Leather tanneries use big quantities of:

NETNUST Entry TestChemistryEnvironmental Chemistry