Which among the following gases present in the air discolours brass nameplates?
Hydrogen Sulphide
Nitrogen
Carbon-di-oxide
Oxygen
Correct Answer :
C. Carbon-di-oxide
Related Questions
Which of the following is a halogen?
Radon
Astatine
Cesium
Ruthenium
Which of the following is used as an illuminant?
Gasoline
Benzoline
Kerosene
Petroleum ether
The pure at form of iron is
wrought iron
steel
pig iron
nickel steel
In addition to nitric acid, another acid which may render iron passive is
acetic acid
oxalic acid
chromic acid
citric acid
Optical instruments are made of
pyrex glass
flint glass
quartz glass
Crooke's glass
A non-metal which is a good conductor or heat and electricity is
iodine
sulphur
graphite
phosphorus
Which of the following is a communicable disease caused by viruses?
Cholera
Dysentery
Diabetes
Measles
Compounds containing only carbon and hydrogen are called
carbohydrates
carbides
hydrocarbons
carbonyls
Which of the following can absorb gases quickly?
Activated charcoal
Anthracite coal
Diamond
Graphite
Which among the following is a local anaesthetic?
Chloroform
Morphine
Streptomycin
Cocaine
The poisonous nature of carbon monoxide is due to
cutting off supply of oxygen
it™s being converted into carbon dioxide
its combination with haemoglobin of blood
its blocking of vocal chords
CAN is used as (Calcium Ammonium Nitrate)
an explosive
a fertilizer
a dye
a bleaching agent
The metal which reacts most violently with cold water is
calcium
sodium
magnesium
potassium
An example of stimulant fertilizer is
gypsum
urea
potassium nitrate
ammonium phosphate
Penicillin was discovered by
Alexander Fleming
Sir JJ Thomson
Dr Nessler
Sir John Russel
The alloy added in the preparation of steel contains
Fe and C
Mn and C
Fe and Mn
Fe, Mn and C
Which of the following is not a supporter of combustion?
Oxygen
Air
Hydrogen
Chlorine
Nitrous oxide used as anaesthetic is usually mixed with
ethyl alcohol
chloroform
oxygen
methyl alcohol
Temporary hardness is due to the presence of
calcium carbonate
calcium bicarbonate
magnesium sulphate
calcium sulphate
Which of the following cannot be used for the preparation of soap?
oleic acid
acetic acid
palmitic acid
stearic acid
The most abundant noble gas present in air is
neon
argon
helium
krypton
Nylon is made from
terephthalic acid and ethylene glycol
hexamethylene diamine and adipic acid
cellulose nitrate
cellulose acetate
The science which deals with the chemistry of life processes is known as
electrochemistry
physical chemistry
biochemistry
tinctorial chemistry
A burning substance which continues to burn in a jar of carbon dioxide is
zinc
red phosphorus
magnesium
sulphur
Ascorbic acid is the chemical name for
Vitamin B6
Vitamin C
Vitamin K
Vitamin D
Rain water collected after a shower la very pure because
the initial showers wash the atmosphere free from most of the impurities
it contains desirable salts like sodium chloride and ammonium nitrate
it dissolves the gases in the atmosphere like ozone which are good for health in small quantities
it is supposed to be 'heaven sent'
The compound or nitrogen used in dry cells is
ammonia
ammonium nitrate
ammonium chloride
ammonium nitrite
Solder is an alloy of
tin and copper
tin and lead
tin and zinc
tin, copper and zinc
Galvanising is coating Iron with
nickel
zinc
chromium
copper
Which of the following is used in fuel to propel rockets?
Petrol
Kerosene
Hydrazine
Alcohol