Which of the following is used as a food preservative?
phenol
washing soda
absolute alcohol
vinegar
Correct Answer :
D. vinegar
Related Questions
Rusting of iron cannot be prevented by
painting
applying alkaline phosphate
applying soap water
galvanising
An antipyretic is a drug used
in the treatment of malaria
to relieve sleepiness
to induce sleep
to lower body temperature
Which of the following elements is not required for the healthy growth of plants?
Nitrogen
Phosphorus
Potassium
Mercury
Diamonds are weighed in
grams
pounds
carats
tons
A burning substance which continues to burn in a jar of carbon dioxide is
zinc
red phosphorus
magnesium
sulphur
The best specimen for drinking purposes is
rain water
river water
conductivity water
deep well water
Dry Ice is
solid carbon dioxide
liquid oxygen
liquid hydrogen
liquid. Chlorine
Which of the following is baking soda?
Na2CO3 . 10H2O
NaHCO3
Na2CO3 . H2O
NH4CI
The raw materials required for the manufacture of glass are
silica, sodium nitrate and soda ash
silica, limestone and sodium nitrate
silica, sodium oxide and limestone
silica, soda ash and limestone
Optical instruments are made of
pyrex glass
flint glass
quartz glass
Crooke's glass
The commonest ore of aluminium is
cryolite
bauxite
malachite
azurite
What is 'oxygen mixture'?
A mixture of potassium nitrate and carbon
A mixture of ammonium chloride and sodium nitrate
A mixture of potassium chlorate and manganese dioxide
A mixture of ammonium nitrate and charcoal
BHC is a
Rodenticide
Herbicide
Pesticide
Fungicide
Which of the following is a Bleaching agent?
Potassium chlorate
Hydrogen peroxide
Copper sulphate
Silver Nitrate
In the making of jewels, gold is usually mixed with
zinc
tin
copper
aluminium
Setting of cement is due to
hydration
dehydration
dialysis
osmosis
Galvanised iron sheets are protected from rusting due to the presence of a layer of
lead
chromium
zinc
tin
Glass articles are annealed so that
they may appear better
they can resist the action of acids and alkalies
they lose their brittleness
they can withstand temperature shocks
The formula for cane sugar is
C6H12O6
C2H5OH
C12H22O11
C7H8O
Annealing of glass is carried out by
rapid cooling
rapid heating
slow cooling
slow heating
On chemical analysis, a bottle cork is found to contain primarily
proteins
carbohydrates
tannins
lipids
Marsh gas is
ethane
ethylene
acetylene
methane
According to the modern Periodic Law, the properties of elements are periodic functions of their
valency
atomic mass
number of neutrons
atomic number
Concrete is a mixture of
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
The alloy which is extremely hard and resistant to acids is
chrome steel
silicon steel
stainless steel
invar
Iodine in alcohol is known as
quick lime
tincture iodine
rectified spirit
None of these
Artificial diamonds were produced by
Moissan
Davy
Faraday
Marie Curie
Rusting is
an oxidation process
a reduction process
a physical change
an electro-chemical process
The main constituent of gobar gas is
methane
nitrogen
carbondioxide
ethylene
PAS is a drug used In the treatment of
tuberculosis
cancer
typhoid
malaria