Starting raw material for the manufacture of alum is
Alumina
Gypsum
Bauxite
Ammonium bicarbonate
Correct Answer :
C. Bauxite
Related Questions
Average sulphur content in Indian pyrites is about __________ percent.
15
35
55
70
Pick out the true statement pertaining to water treatment.
Slow sand filters can remove colour completely
Activated carbon can be used for taste & odour control without subsequent filtration
Application of activated carbon reduces the temporary hardness of water
Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both (B) and (C)
All enzymes are made of
Fats
Carbohydrates
Proteins
Amino acids
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
In the manufacture of viscose rayon, the raw material used industrially is
Eucalyptus wood
Bamboo
Bagasse
Fine teak wood
Sizing material is incorporated in paper to
Impart resistance to penetration by liquids
Increase its thickness
Increase its flexibility & opacity
Increase its brightness
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
Cationic
Anionic
Amphoteric
Semi polar
Zeolite is a/an
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
As a lubricant
As a rust preventive
In hard water for cleaning of cloth
As a foam depressant in distillation column
Enamels
Give good glossy finish
Are same as varnish
Are prepared from non-drying oil
Do not contain pigment
The function of gypsum addition during cement making is to
Increase the density of cement
Decrease the cement setting rate
Both (A) and (B)
Neither (A) nor (B)
Polycaprolactam is commercially known as
Nylon-6
Nylon-66
Dacron
Rayon
Pick out the wrong statement.
Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate
Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide
Ordinary glass is represented chemically by Na2O . CaO . 6SiO2
Red color is imparted to glass by addition of arsenic oxide
Na2CO3 is called
Washing soda
Soda ash
Plaster of Paris
Calcite
Catalytic oxidation-dehydrogenation of methyl alcohol produces
Formaldehyde
Phenol
Acetone
Maleic anhydride
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
Hard
Soft
Metallic
Lubricating
Varnish does not contain
Thinner
Pigment
Both (A) & (B)
Neither (A) nor (B)
Which of the following is a constituent of coffee?
Caffeine
Nicotine
Calgon
Lignin
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
7-14 and 14-30
7-14 and 40-50
14 - 30 and 40-50
10 - 20 and 40 - 50
Styrene butadiene rubber (SBR) is
A natural rubber
A synthetic polymer
A synthetic monomer
Another name of silicone rubber
The main use of activated carbon in water treatment is to control
Bacterial growth
Taste and odour
Turbidity
None of these
Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
Oxidation of Na+ ions
Oxidation of Cl- ions
Reduction of Na+ ions
Reduction of Cl- ions
Percentage of alcohol in beer may be around __________ percent.
2-8
18-23
27-32
1-4
Starting material for the production of butadiene in India is
Naphthalene
Benzol
Ethyl alcohol
Phthalic anhydride
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
High cost
Fragile nature
Easy poisoning tendency
All (A), (B) and (C)
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
Calcium sulphate
Sodium chloride
Sodium sulphate
Magnesium chloride
Dacron (or Terylene) fibres as compared to nylon fibres have
Better heat & acid resistant properties
Poorer resistance to alkalis
Poorer dyeability
All (A), (B) and (C)
Kopper-Totzek coal gasifier
Can give ammonia synthesis gas (H2 + N2)
Is a moving bed reactor
Cannot use coking coal
Operate at very high pressure
Caprolactam (a raw material for nylon-6 manufacture) is produced from
Phenol
Naphthalene
Benzene
Pyridine