Commercial production of calcium carbide requires limestone and __________ as raw materials.
Coke
Sand
Soda ash
Fuel oil
Correct Answer :
B. Sand
Related Questions
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
Diamine and the ring
Dibasic acid and the ring
Diamine and the dibasic acid
None of these
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
Dilute H2SO4
Oleum
Ultraviolet light
None of these
Varnish does not contain
Thinner
Pigment
Both (A) & (B)
Neither (A) nor (B)
Glycerine is recovered from lye by
Evaporation followed by vacuum distillation
Liquid extraction technique
Extractive distillation technique
None of these
__________ is not a constituent of gun powder.
Carbon
Charcoal
Sulphur
Potassium nitrate
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
The main component of Pyrex glass is
Zinc
Lead
Boron
Selenium
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system).
P
√P
P2
1/P
Naphthols are derivates of
Methyl amine
Naphthalene
Phenol
Xylene
Pick out the wrong statement.
Fibrillation of fibre during paper manufacture is done to develop the strength in paper
Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number
Bagasse fibre contains both lignin & cellulose
Presence of sodium sulphate in pulp makes the pulp bleachability poor
The most reactive allotropic form of phosphorus is __________ phosphorus.
Red
Yellow
Violet
Black
Dacron is a
Condensation product of Hexamethylene diamine and adipic acid
Thermosetting material
Condensation product of dimethyl terephthalate and ethylene glycol
None of these
Drinking (potable) water treatment does not involve
Coagulation
Sedimentation
Softening
Disinfection
Fat dispersed in water is exemplified by
Colloids
Gel
Butter
Emulsion
A mineral is termed as 'ore', if
A metal can be economically extracted from it
It contains ≥ 40% metal
The metal present in it is costly
All (A), (B) and (C)
__________ glass is used for the manufacture of optical glass.
Pyrex
Soda
Flint
Crooke's
Enzymes are
Proteins with high molecular weight (around 10,000)
Derived from living organisms
Catalyst for temperature sensitive reactions
All (A), (B) and (C)
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
Chromium
Arsenic
Copper
Manganese
Widely used method for the conditioning of boiler feed water is the
Cold lime process
Coagulation
Hot-lime soda process
Sequestration
Phenol formaldehyde
Employs addition polymerisation
Employs condensation polymerisation
Is a monomer
Is an abrasive material
Which of the following is an explosive?
Nitro-glycerine
Trinitrotoluene (TNT)
Cellulose nitrate
All (A), (B), and (C)
The process used for the manufacture of ethyl alcohol from molasses is
Distillation
Dehydration
Dehydrogenation
None of these
CaO is called
Quick lime
Slaked lime
Limestone
Calcite
Alum is commercially produced from
Gypsum
Feldspar
Galena
Bauxite
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
Alumina
Silica gel
Platinum
Nickel
Use of water having dissolved oxygen in boilers promotes
Corrosion
Sequestration
Scale formation
None of these
Which of the following is not required in the manufacture of soda ash by Solvay process?
Ammonia
Limestone
Nitric acid
None of these
Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by
Iron-steam reaction
Electrolysis of water
Steam reforming of naphtha
Its cryogenic separation from coke oven gas
Main use of hydrazine is
As a rocket fuel
In water treatment
As a disinfectant
As fire retardant
Liquor poisoning generally occurs due to the presence of __________ in it.
Ethyl alcohol
Impurities
Methyl alcohol
Carbonic acid