Phenol formaldehyde resin is used as an adhesive in making
Laminates
Card boxes
Furniture
Books
Correct Answer :
A. Laminates
Related Questions
Sudden temperature fluctuation does not affect pyrex glass, because of its
Low co-efficient of expansion
High co-efficient of expansion
High melting point
Both (B) and (C)
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
12
22
0.3
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Ammonium chloride
Sodium carbonate
Sodium bi-carbonate
Insulin is an __________ drug.
Anti-malarial
Anti-TB
Antibiotic
None of these
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
70
55
80
94
Glycerine can be obtained from
Fat
Naphthalene
Cumene
Sucrose
Addition of calcium oxide to water produces
Exothermic heat
Hissing sound
Slaked lime
All (A), (B) & (C)
Which of the following is the second major component of cement?
Al2O3
CaO
SiO2
Fe2O3
Fish contains about __________ percent oil.
5
10
20
35
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
-5 to 0
5 to 10
30 to 50
75 to 80
Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
Pick out the wrong statement.
Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
Soap powder is prepared by mixing soap with hydrated sodium carbonate
Detergents differ from soaps in their action in hard water
Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
Pick out the wrong statement.
Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%
The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide
Vitriol oil is nothing but technical sulphuric acid
Decomposition of sulphuric acid on heating does not start before its boiling
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
1 atm & 100°C
5 atm & 275°C
100 atm & 500°C
50 atm & 1000°C
Heating of __________ to 120°C, produces plaster of paris.
Blue vitriol
Gypsum
Calcium silicate
Calcium sulphate
SO2 is bubbled through hot sugar cane juice to
Act as an acidifying agent
Increase its concentration
Increase the amount of molasses
Increase the crystal size
Chemical name of 'alum' is
Barium sulphate
Aluminium sulphate
Aluminium chloride
Calcium sulphate
Which one of the following is not likely to be a constituent of vegetable oils?
Citric acid
Oleic acid
Stearic acid
Glycerol
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
25
60-70
150-200
250-300
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
Soda lime
Lead
High silica
Viscose rayon
Cannot be made from sulphite pulp
Utilises H2SO4, NaOH and CS2 during its manufacture
Cannot yield textile grade fibre
None of these
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
Phthalic anhydride is made by the
Oxidation of naphthalene
Oxidation of benzene
Dehydrogenation of ethyl benzene
None of these
__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.
Bauxite
Limestone
Quartz
Manganese
The type of high refractive index glass used in optical instruments is __________ glass.
Pyrex
Flint
Crookes
None of these
Pick out the wrong statement.
DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction
Chloral is obtained by the chlorination of ethyl alcohol
Insecticides acting on the insects through the respiratory system are called fumigants
Benzene hexachloride is not a contact insecticide
Pick out the wrong statement.
Catalytic hydrogenation of carbon monoxide produces methyl alcohol
In nylon-6, the number 6 represents the total number of carbon atoms in the ring
Raw materials for DDT manufacture are benzene and chlorine
Ethanolamines are produced by using ammonia and ethylene oxide as raw material
Temporary hardness of water can be removed by
Addition of alum (a coagulant)
Boiling
Filtration (through gravity sand filter)
Addition of lime
Chrome tanning and vegetable tanning are done for
Light & heavy leather respectively
Heavy & light leather respectively
Both light & heavy leather
Neither light nor heavy leather
Hydrazine (N2H4) is used mainly as a/an
Explosive
Rocket fuel
Detergents additive
None of these