Related Questions
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4
Lubricating greases are a mixture of
A. Mineral oil, soap and additives
B. Mineral oil and metallic soap
C. Mineral oil and fatty oil
D. Fatty oil and metallic soap
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4
'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
A. Final rolling out of paper
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4
Electro deposition of metals i.e. electroplating is never done on
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4
Iron ore hematite is concentrated using
A. Electromagnetic separation mainly
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4
Pig iron is produced by blast furnaces in India using mostly the iron ore named
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4
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
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4
Which of the following is not a product of coal tar distillation?
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4
Dry ice (solidified CO2) is used for the
A. Storage & shipment of frozen foods and ice-creams
B. Liquefaction of permanent gases
C. Liquefaction of natural gas
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4
Cement mainly contains
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4
Fusion of bauxite and __________ produces high alumina cement.
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4
Sand and __________ is fused at 1300°C, to produce sodium silicate.
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4
Varnish does not contain
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Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.
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4
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
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4
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
A. SO3 gas is sparingly soluble in water
B. Water forms an acid mist, which is difficult to absorb
C. The purity of acid is affected
D. Scale formation in the absorber is to be avoided
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4
Sizing material is incorporated in paper to
A. Impart resistance to penetration by liquids
B. Increase its thickness
C. Increase its flexibility & opacity
D. Increase its brightness
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4
Pure rectified spirit contains about __________ percent alcohol.
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4
Catalyst used in the hydrogenation of oil is
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4
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
C. Sodium tripolyphosphate (STPP)
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4
Which of the following is not a food additive?
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4
The most widely used coagulant for removing suspended impurities from water is
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4
Acrylonitrile is mainly used in the __________ industry.
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4
Nitrogen is an essential component of
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4
The temperature in the calcium carbide furnace is __________ °C.
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4
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
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4
Saponification number of an oil or fat
A. Gives an idea about its molecular weight
B. Is inversely proportional to its molecular weight
C. Detects its adulteration
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4
Plaster of Paris is
B. Used for setting of broken bones
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4
Use of water having dissolved oxygen in boilers promotes
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4
The manufacture of Kraft pulp is done by a/an __________ process.
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4
Calcination of limestone is not done in a __________ kiln for producing lime.