Unsaturated oils compared to saturated oils have
Lower melting point & higher reactivity to oxygen
Higher melting point & higher reactivity to oxygen
Lower melting point & lower reactivity to oxygen
Higher melting point & lower reactivity to oxygen
Correct Answer :
A. Lower melting point & higher reactivity to oxygen
Related Questions
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
Sodium silicate
Sodium borate
Sodium tripolyphosphate (STPP)
Caustic soda
Ca(OH)2 is called
Quicklime
Slaked lime
Limestone
Gypsum
The temperature in the calcium carbide furnace is __________ °C.
200-300
700-850
2000-2200
4000-4500
Esterification reaction
Produces soap
Is reversible
Is a reaction between an alcohol and an organic acid
All (A), (B) and (C)
Molecular weights of polymers are in the range of
102 - 102
105 - 109
102 - 107
109 - 1011
In primitive days, __________ was being manufactured by Leblanc Process.
Alum
Washing soda
Soda ash
Calcium carbide
Transparent soaps (e.g. Pears) are
Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
Metallic soaps with frothing agent and free Stearic acid to achieve transparency
Metallic soaps with frothing agent from which glycerine has not been recovered
None of these
Bromine is used in the preparation of
Fire extinguishing compounds
Fire proofing agents
Dyes and antiknock compounds
All (A), (B) and (C)
Soaps remove dirt by
Increasing the surface tension
Decreasing wettability
Supplying hydrophilic group
None of these
Which is a high grade pulp?
Rag pulp
Mechanical pulp
Sulphate pulp
Sulphite pulp
Chemical formula of BHC, which is an insecticide is
C6H6Cl6
C6Cl6
C6H5Cl
C6H4Cl2
Yellow glycerine is made into white, using
Activated carbon
Diatomaceous earth
Bauxite
Bentonite
Which of the following is an endothermic reaction?
Absorption of SO3 in 98% H2SO4
C + H2O = CO + H2
Thermal dissociation of iron pyrites
Both (B) and (C)
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an
Explosive
Soap
Detergent
Analgesic drug
Styrene (a monomer for the production of polystyrene) is commercially produced by
Catalytic dehydrogenation of ethyl benzene
Dehydration of ethyl alcohol followed by hydrogenation
Reacting ethylene oxide with acetaldehyde
Fermentation of starch
Enzymes are organic catalysts used in the __________ reactions.
Chemical
Biochemical
Photochemical
Electrochemical
Solvent used for extraction of oil is
Hexane
Methyl ethyl ketone
Furfural
None of these
The enzyme which converts starch into the disaccharides maltose is
Diastase
Maltase
Yeast
None of these
Vulcanisation of rubber
Decreases its tensile strength
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance
Converts its plasticity into elasticity
Sulphuric acid saturated with SO3 is called
Concentrated H2SO4
Sulphurous acid
Oleum
None of these
Presence of carbonaceous matter in the sewage
Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
Reduces sulphate ions to sulphides causing obnoxious smell
Increases the quantity of chlorine used for its purification
All (A), (B) and (C)
Which oil is preferred for paint manufacture?
Drying oil
Non-drying oil
Semi-drying oil
Saturated oil
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
Dilute H2SO4
Oleum
Ultraviolet light
None of these
99.5% purity oxygen is used in
Cutting and welding by oxy-acetylene flame
Hospitals for medicinal purposes
Gas masks and artificial breathing apparatus
All (A), (B), and (C)
Blue colour is imparted to glass by the addition of
FeSO4
PbO
CaO
NaOH
The chamber process is
Preferred over contact process for producing 98 to 100% H2SO4 and various oleums
Non-catalytic and operates only on pyrites
A batch process for directly producing high strength (98 to 100%) H2SO4
None of these
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
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
Avoid mechanical weakening of fibre
Remove lignin by way of crystallisation
Increase the cellulose content
None of these
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
Hydrogenation of edible vegetable oils
Is an exothermic reaction
Increases their melting point
Is done in presence of nickel catalyst
All (A), (B) and (C)