General Chemistry (Part 4) Flashcards
The chemical name of Common salt is:
sodium chloride
Denatured spirit is ethanol mixed with:
pyridine
The most abundant inert gas in the atmosphere is:
argon
Which metal is extracted from seawater?
magnesium
Percentage of lead in lead pencils is:
0
Water is not effective in extinguishing a fire caused by petrol because:
Water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn.
Helium gas is used in gas balloons instead of hydrogen gas because it is:
noncombustible
The gas used in the artificial ripening of fruits is:
acetylene
Ruby and sapphire are oxides of:
aluminum
The gas which turns into liquid at the lowest temperature among the following is:
hydrogen
Gunpowder consists of a mixture of:
nitrite sulfur and charcoal
In nuclear reactors graphite is used as a an:
moderator
Sea water can be purified by the process of:
distillation
Detergents clean surfaces on the principle of:
surface tension
The compound to which H2 does not add is:
tetraphenyl ethylene
Ammonia is a mixture of
aluminum powder and ammonium nitrate
Which gas does not form the part of atmosphere?
Nitrogen| Helium | Chlorine | None of these
chlorine
The fuel used in an atomic reactor is:
uranium
White coal is:
hydroelectricity
The major constituent of Gobar gas is:
methane
The residue left after extracting juice from sugar beet and sugarcane is called:
bagasse
The isotope of Uranium used in atomic reactors is:
U-235
The greenhouse effect is caused by the higher level of which gas in the atmosphere?
CO2
Candle is a mixture of:
paraffin wax and stearic acid
Ethanol containing 5% water is known as:
rectified spirit
The important ore of aluminum is:
bauxite
Aqua regia is a 1:3 mixture by volume of:
concentrated nitric acid and concentrated hydrochloric acid
What is the maximum water vapor content in the atmosphere?
3 to 4 %
The amount of chlorine available in water after disinfection is called as:
residual chlorine
What are the major pollutants of cigarette smoke?
carbon monoxide and nicotine
Nuclear energy is a mineral based energy source. It is derived from:
uranium
Zinc sulfide is commonly used as:
rodenticide
The purest form of water is:
rainwater
The main constituent of biogas is:
methane
Aspirin is chemically known as:
acetylsalicylic acid
The most abundant element in the human body is:
oxygen
Which of the following is not a greenhouse gas?
Hydrogen | Carbon dioxide | Nitric acid | Chlorofluorocarbon
hydrogen
Litmus is obtained from:
lichen
Wax used for making candle is chemically a mixture of:
aliphatic hydrocarbons
Vinegar made by fermentation from cane sugar contains:
acetic acid
Photo oxidation process is initiated by:
light
Ultraviolet radiation striking this earth is due to the depletion of:
ozone
Major gaseous pollutant of the thermal power station is:
SO2
The process of removing calcium and magnesium from hard water is known as:
water softening
The tip of the matchstick contains:
red phosphorus
Commercially sodium bicarbonate is known as:
baking soda
An emulsifier is an agent which:
stabilizes the emulsion
Mortar is a mixture of water sand and:
slaked lime
Which of the following substance is highly plastic?
clay
The National Chemical Laboratory (India) is located in:
Pune
