Chemical Process

A. High early strength cement are made from materials having high silica to lime ratio
B. The function of gypsum in cement is to enhance its initial setting rate
C. Acid resistant cements are known as silicate cement
D. Major component of greyish Portland cement is tricalcium silicate

A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence
of oleum, which is a highly exothermic reaction
B. Chloral is obtained by the chlorination of ethyl alcohol
C. Insecticides acting on the insects through the respiratory system are called fumigants
D. Benzene hexachloride is not a contact insecticide

A. A fat is converted into oil by its hydrogenation
B. There is no difference between a fat and an oil so far as its physical properties are concerned
C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon
atoms
D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their
fatty acids content

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. 50
B. 70
C. 95
D. 80

A. Before filtration, reduces the bacterial load on filters
B. After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
C. Is to adjust the pH value
D. All A , B. and C.

A. Ethyl magnesium chloride
B. Methyl magnesium chloride
C. Dichlorophenol
D. Monochloroacetic acid

A. Phthalic anhydride
B. Vinyl chloride
C. Maleic anhydride
D. Dacron

A. Pesticides
B. Plasticisers for unsaturated polyesters
C. Pain-relieving drugs (analgesic)
D. Tranquilisers

A. Bromine
B. Magnesium compounds
C. Potassium compounds
D. Sodium sulphate