In the common soda-acid fire extinguisher, the fire is put out by
acid fumes
sodium bicarbonate
carbon dioxide
sodium carbonate
Correct Answer :
C. carbon dioxide
Related Questions
The compound of iron used in the manufacture of blue-black ink is
ferric chloride
ferric sulphate
ferric thiocyanate
ferrous sulphate
Concrete is a mixture of
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
Deficiency of iron causes
nervous disorders
heart diseases
anaemia
impairment of vision
The gas used in balloons in the place of hydrogen is
nitrogen
helium
neon
argon
Which among the following gases present in the air discolours brass nameplates?
Hydrogen Sulphide
Nitrogen
Carbon-di-oxide
Oxygen
The term 'nucleons' apples to
neutrons
protons
protons and neutrons
protons and electrons
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
Iodine in alcohol is known as
quick lime
tincture iodine
rectified spirit
None of these
The vitamin that is found in citrus fruits such as lemon and orange is
vitamin C
vitamin B2
vitamin A
vitamin E
A metal which occurs 'free' in nature is
gold
zinc
tin
molybdenum
Which of the following act a both u oxidising and reducing agent?
nitric acid
ammonia
nitrous acid
nitrogen peroxide
Which of the following biology laboratory?
Phenol
Benzaldehyde
Formaldehyde
Acetic acid
Rusting is
an oxidation process
a reduction process
a physical change
an electro-chemical process
Invert sugar is
sucrose
glucose
fructose
a mixture of glucose and fructose
Sulphur is readily soluble in
Water
Alcohol
Carbon-di-sulphide
Sodium chloride solution
Carbogen is used in
CO2 poisoning
CO poisoning
phosgene poisoning
anesthesia
The compound which is both an antiseptic and a disinfectant is
phenol
iodoform
bleaching powder
blue vitriol
A non-metal which is a good conductor of electricity is
graphite
phosphorus
sulphur
iodine
Tincture iodine is a solution of
iodine in potassium iodide
iodine in alcohol
iodine in water
iodine in carbon disulphide
The neutron was discovered by
Chadwick
Madam Curie
Becquerel
Aston
A burning substance which continues to burn in a jar of carbon dioxide is
zinc
red phosphorus
magnesium
sulphur
Galvanising is coating Iron with
nickel
zinc
chromium
copper
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
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion
A substance used both as an explosive and as a germicide is
phenol
TNT
picric acid
iodoform
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
Rusting of iron cannot be prevented by
painting
applying alkaline phosphate
applying soap water
galvanising
According to the modern Periodic Law, the properties of elements are periodic functions of their
valency
atomic mass
number of neutrons
atomic number
Solder is an alloy of
tin and copper
tin and lead
tin and zinc
tin, copper and zinc
Galvanising is the process of coating
iron with zinc
zinc with iron
copper with silver
silver with gold