An example of thermo setting plastics is
bakelite
polythene
PVC
Teflon
Correct Answer :
A. bakelite
Related Questions
Annealing of glass is carried out by
rapid cooling
rapid heating
slow cooling
slow heating
Glass is a ______ mixture of metallic ______.
homogeneous, sulphates
heterogeneous, nitrates
heterogeneous, carbonates
homogeneous, silicates
The presence of dust particles in air serves
as a nucleus to condense water vapour resulting in rain
to maintain the average density of air
to minimise the inflammatory nature of oxygen
to protect the inhabitants of the earth from the effects of ultra violet rays.
Quick lime has the formula
CaO
Ca(OH)2
NaOH
Na2CO3
The modern system of symbols was evolved by
Dalton
Cavendish
Avogadro
Berzelius
The discoverer of chloroform was
Liebig
Pasteur
Bunsen
Erlenmeyer
LSD is
an anaesthetic
a psychedelic drug
an antipyretic
an antibiotic
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion
The pure at form of iron is
wrought iron
steel
pig iron
nickel steel
The compound which is both an antiseptic and a disinfectant is
phenol
iodoform
bleaching powder
blue vitriol
Riboflavin deficiency causes
tongue inflammation
pellagra
night blindness
anaemia
During fermentation, the by-product is
ethyl alcohol
methyl alcohol
carbon monoxide
carbon dioxide
The freezing point of water at 760 mm pressure is
273 K
0 K
273°C
-273°C
The substance preserved under water is
potassium
sodium
red phosphorus
white phosphorus
Which of the following statements regarding natural radioactivity is true?
It is spontaneous disintegration of atoms
It is induced by bombardment with projectiles
It is transmutation of atoms with projectiles
It is dependent on temperature
Brass contains
copper and tin
aluminium and magnesium
copper and zinc
copper, tin and zinc
A mixture of naphthalene and sand is separated by
evaporation
using a magnet
sublimation
sedimentation
Vulcanisation was discovered by
Goodyear
Wohler
Baeyer
Perkin
Physico-chemical characteristics of water in water sources undergo changes due to
aquatic macrophytes
aquatic fungi
effluents
evapotranspiration
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
The kinetic energy of gas molecules
is unaffected by temperature variations
decreases with increase of temperature
increases with decrease of temperature
increases with increase of temperature
Which of the following is a mixture?
Baking soda
Milk
Chloroform
Copper wire
The poisonous nature of carbon monoxide is due to
cutting off supply of oxygen
it™s being converted into carbon dioxide
its combination with haemoglobin of blood
its blocking of vocal chords
When ants bite, they inject
glacial acetic acid
methanol
formic acid
stearic acid
Brine is a solution of
sodium chloride in water
iodine in alcohol
sulphur in carbon disulphide
Potassium iodide in water
The gas evolved when ammonium nitrate is heated is
nitrogen
nitric oxide
nitrogen peroxide
nitrous oxide
The main constituent of gobar gas is
methane
nitrogen
carbondioxide
ethylene
Which one of the following is used in dry cleaning of garments?
asphalt
naphtha
diesel oil
lubricating oil
A compound of carbon used as anaesthetic is
carbon disulphide
carbon tetrachloride
phosgene
chloroform
Oxalic acid is used in the manufacture of
tincture iodine
paints
ink
aerated water