Which of the following is not a characteristic of potable water?
It must be free from suspended impurities
It must be free from harmful bacteria
It must contain traces of sodium bicarbonate
It must have a fishy odour
Correct Answer :
D. It must have a fishy odour
Related Questions
Plastics are synthetic
rubbers
fibres
resins
sugars
An example of thermo setting plastics is
bakelite
polythene
PVC
Teflon
An acid which is used as a preservative for pickles is
hydrochloric acid
citric acid
tartaric acid
acetic acid
The compound used in photography is
ammonium dichromate
copper Sulphate
magnesium Sulphate
sodium thiosulphate
The artificial silk produced from cellulose is
Polyethylene
Nylon
Terylene
Rayon
In surgical operation, the anaesthetic commonly used nowadays is
iodoform
chloroform
nitrous oxide-ether mixture
chloroform-nitrous oxide mixture
The first organic compound prepared in the laboratory was
acetic acid
chloroform
urea
methane
Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?
Aluminium
Chromium
Nickel
Tungsten
A valuable by-product in the manufacture of soap is
stearic acid
sodium hydroxide
palmitic acid
glycerol
A drug that is usually administered for malaria is
sulphanilamide
quinine
methicillin
novocaine
Laughing gas is
nitric oxide
nitrogen peroxide
nitrogen pentoxide
nitrous oxide
Solid carbon dioxide (Dry ice) is also known as
Thiokol
Drikold
Perhydrol
Mannitol
On chemical analysis, a bottle cork is found to contain primarily
proteins
carbohydrates
tannins
lipids
Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the
Law of Multiple Proportions
Law of Definite Proportions
Law of Conservation of Mass
Law of Reciprocal Proportions
Invar, used for making pendulums is an alloy of steel with
tungsten
nickel
manganese
chromium
One method by which the components of air can be separated is
shaking with caustic soda solution
shaking with water
fractional distillation of liquid air
passing air over heated magnesium
In the nitrogen cycle, denitrifying bacteria
oxidise ammonia to nitrates
convert nitrogen into ammonia
oxidise ammonia to free nitrogen
oxidise ammonia to oxides of nitrogen
The gas used in balloons in the place of hydrogen is
nitrogen
helium
neon
argon
High temperature thermometers use
sodium amalgam
an alloy of sodium and potassium
silver amalgam
calcium amalgam
Which of the following is not a food material?
silicate
protein
fat
carbohydrate
Plaster of Paris
contracts while setting
expands while setting
is highly volatile
does not suffer any changes in volume while setting
A substance used as a fire-extinguisher under the trade name of Pyrene is
carbon dioxide
chloroform
carbon tetrachloride
bleaching powder
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion
A hormone which contains iodine is
adrenalin
glucagon
epinephrin
thyroxin
The depletion of the ozone layer in the upper atmosphere is due to -extensive use of
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
A non-metal which is a good conductor or heat and electricity is
iodine
sulphur
graphite
phosphorus
CAN is used as (Calcium Ammonium Nitrate)
an explosive
a fertilizer
a dye
a bleaching agent
The compounds produced by plants in the process of photosynthesis are
carbohydrates
proteins
salts
fats
In the common soda-acid fire extinguisher, the fire is put out by
acid fumes
sodium bicarbonate
carbon dioxide
sodium carbonate
Diamonds are weighed in
grams
pounds
carats
tons