Hydrogen gas has
a very sweet smell
a very pungent smell
an irritating smell
no smell at all
Correct Answer :
D. no smell at all
Related Questions
A non-metal which is a good conductor or heat and electricity is
iodine
sulphur
graphite
phosphorus
The first organic compound prepared in the laboratory was
acetic acid
chloroform
urea
methane
Real gases tend to become ideal Under
low pressure and high temperature
low pressure and low temperature
high pressure and low temperature
high pressure and high temperature
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
Quick lime has the formula
CaO
Ca(OH)2
NaOH
Na2CO3
The sugar which is used in silvering mirrors is
sucrose
maltose
glucose
fructose
Which one of the following metals is used to extract another metal?
Lead
Tin
Zinc
Aluminium
Laughing gas is
nitric oxide
nitrogen peroxide
nitrogen pentoxide
nitrous oxide
Which of the following is used as an illuminant?
Gasoline
Benzoline
Kerosene
Petroleum ether
Bordeaux mixture contains
copper sulphate and water
copper sulphate, lime and water
thio-urea and lime
copper sulphate and thio-urea
Which of the following is not an antibiotic?
streptomycin
terramycin
aureomycin
codein
Plaster of Paris
contracts while setting
expands while setting
is highly volatile
does not suffer any changes in volume while setting
A burning substance which continues to burn in a jar of carbon dioxide is
zinc
red phosphorus
magnesium
sulphur
Dust particles in the air of large industrial cities are removed by
Sedimentation
Electrophoresis
Tyndall effect
Brownian movement
Temporary hardness is due to the presence of
calcium carbonate
calcium bicarbonate
magnesium sulphate
calcium sulphate
The gas which has a faint sweet odour is
nitrogen
nitrous oxide
nitric oxide
nitrogen peroxide
Dry Ice is
solid carbon dioxide
liquid oxygen
liquid hydrogen
liquid. Chlorine
The Carbon dioxide is absorbed by
Palladium
NaCI
KOH
Dilute H2SO4
Brine is a solution of
sodium chloride in water
iodine in alcohol
sulphur in carbon disulphide
Potassium iodide in water
Iron is rendered passive by
conc. H2SO4
conc. HCl
conc. HNO3
acetic acid
Which of the following is not a chemical change?
Burning of magnesium ribbon in air
Distillation of water
Heating of cane sugar
Setting of cement
In photography, the compound or nitrogen used is
Potassium nitrate
Silver nitrate
Ammonium carbonate
Ammonium bicarbonate
The carbon cycle ensures that
the percentage of carbon dioxide in air is kept almost constant
air always contains a constant proportion of oxygen
sufficient amounts of carbohydrates are produced
the process of photosynthesis proceeds smoothly
The compound of iron used in the manufacture of blue-black ink is
ferric chloride
ferric sulphate
ferric thiocyanate
ferrous sulphate
When ants bite, they inject
glacial acetic acid
methanol
formic acid
stearic acid
Which among the following is a metalloid?
Tin
Silver
Iodine
Arsenic
The main element used in the vulcani-sation of rubber is
nickel
copper
sulphur
graphite
The Combined Gas Law equation is
P1V1T1 = P2 V2 T2
P1V1T2 = P2V2T1
P = P1 + P2 + P3
C =
The oldest known organic compound is
urea
methane
acetic acid
benzene
A hormone which contains iodine is
adrenalin
glucagon
epinephrin
thyroxin