A. Low ash content

B. Low ignition temperature

C. High electrical resistivity

D. All (A), (B) and (C)

A. 1 - 2

B. 15 - 20

C. 50 - 60

D. 80 - 85

A. Na₂CO₃

B. Na₂CO₃.H₂O

C. Na₂CO₃.10H₂O

D. NaHCO₃

A. Bleaching powder

B. Slaked lime

C. Alum

D. Copper sulphate

A. To produce benzene

B. To produce phenol formaldehyde

C. To produce polyester resin

D. As a plasticiser for unsaturated polyester

A. Caustic soda

B. Soda ash

C. Bromine from sea water

D. Hydrochloric acid

A. 30

B. 50

C. 70

D. 90

A. Na₂SO₄.10H₂O

B. CaCl(OCl)

C. CaSO₄.H₂O

D. (NH₄)₂SO₄

A. Chromium

B. Arsenic

C. Copper

D. Manganese

A. Do not soften on application of heat

B. Are heavily branched molecules

C. Are solvent insoluble

D. None of these

A. 0.14

B. 0.34

C. 0.94

D. 1.4

A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action

B. Soap powder is prepared by mixing soap with hydrated sodium carbonate

C. Detergents differ from soaps in their action in hard water

D. Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

A. Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate

B. Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide

C. Ordinary glass is represented chemically by Na₂O . CaO . 6SiO₂

D. Red color is imparted to glass by addition of arsenic oxide

A. Controlling timber degradation by ants

B. Controlling poultry lice

C. Potato beetle

D. Citrus fruits

A. Flocculate the impurities

B. Facilitate fast filtration

C. Both (A) and (B)

D. Neither (A) nor (B)

A. Glauber's salt

B. Common salt

C. Chlorine

D. Graphite electrode

A. Does not affect the lather formation by soap

B. Is not unfit for drinking purpose

C. Pollutes the water stream

D. All (A), (B) and (C)

A. Bicarbonates & sulphates of calcium and magnesium

B. Undesirable taste and odour

C. Bacteria

D. Its corrosiveness

A. Bi-carbonates

B. Sulphates & chlorides

C. Carbonate

D. None of these

A. 0.5

B. 5

C. 20

D. 35

A. Conversion of SO₂ to SO₃ in Monsanto-4 pass converter is about 98%

B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide

C. Vitriol oil is nothing but technical sulphuric acid

D. Decomposition of sulphuric acid on heating does not start before its boiling

A. Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics

B. Attain distinctiveness from other brands

C. Act as tarnish inhibitor for metals like German silver

D. None of these

A. Require lower initial investment

B. Require more power

C. Produce lower concentration NaOH

D. None of these

A. Remove residual turbidity

B. Reduce the bacterial load on filter

C. Control taste and odour

D. Remove chlorinous taste

A. SO₃ and 80kg of H₂SO₄

B. H₂SO₄ and 80kg of SO₃

C. SO₃ for each 100 kg of H₂SO₄

D. None of these

A. Freeze drying

B. Electrolytic

C. Solar evaporation

D. Vacuum evaporation

A. Maltose

B. Starch

C. Sucrose

D. Glucose

A. Roasting

B. Smelting

C. Froth floatation

D. Electromagnetic separation

A. Depithing

B. Digestion

C. Bleaching

D. None of these

A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%

B. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%

C. 75% oleum can be produced by distillation of 20% oleum

D. Contact process of sulphuric acid manufacture uses nickel as the catalyst

A. Deaeration

B. Dechlorination

C. Both (A) & (B)

D. Neither (A) nor (B)