Which of the following biology laboratory?
Phenol
Benzaldehyde
Formaldehyde
Acetic acid
Correct Answer :
C. Formaldehyde
Related Questions
The Combined Gas Law equation is
P1V1T1 = P2 V2 T2
P1V1T2 = P2V2T1
P = P1 + P2 + P3
C =
CAN is used as (Calcium Ammonium Nitrate)
an explosive
a fertilizer
a dye
a bleaching agent
White lead is
a basic salt
an acid salt
a double salt
a normal salt
The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by
A - Z
A + Z
Z
A
Carbogen is used in
CO2 poisoning
CO poisoning
phosgene poisoning
anesthesia
The discoverer of chloroform was
Liebig
Pasteur
Bunsen
Erlenmeyer
Invar, used for making pendulums is an alloy of steel with
tungsten
nickel
manganese
chromium
Two or more entirely different compounds having the same molecular formula are known as
isobars
isotopes
isomorphs
isomers
Refined petroleum is decolourised by
manganese dioxide
bauxite
animal charcoal
quicklime
A form of carbon which is a good lubricant is
diamond
coke
graphite
charcoal
Apart from lead tetra-ethyl, the other compound used as antiknock is
n-heptane
n-octane
iso-heptane
iso-octane
Clark's method for removal of temporary hardness in water uses
calcium hydroxide
washing soda
calcium chloride
zeolite
Ethyl alcohol is
a deliquescent substance
an efflorescent substance
a hygroscopic substance
a dehydrating substance
Calomel is
lead chloride
mercurous chloride
mercuric chloride
calcium sulphate
Stainless steel contains steel and
manganese
vanadium
nickel
chromium
The flux added in the blast furnace is
Limestone
FeO
SiO2
MgO
The non-metal which is electropositive is
chlorine
nitrogen
sulphur
hydrogen
Which among the following is a solid non-metal?
chlorine
mercury
water
iodine
Compounds containing only carbon and hydrogen are called
carbohydrates
carbides
hydrocarbons
carbonyls
A non-metal which is a good conductor of electricity is
graphite
phosphorus
sulphur
iodine
The oldest known organic compound is
urea
methane
acetic acid
benzene
One of the ingredients of the paste on the side of a match box is
phosphorus pentaoxide
phosphorus trichloride
phosphorus trisulphide
phosphorus trioxide
Compounds of nitrogen with metals are called
nitrates
nitrites
hyponitrates
nitrides
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
The process of heating steel to bright red heat and cooling suddenly by plunging it into water is known as
annealing
hardening
quenching
tempering
Hydrogen gas has
a very sweet smell
a very pungent smell
an irritating smell
no smell at all
Deficiency of iron causes
nervous disorders
heart diseases
anaemia
impairment of vision
Which of the following act a both u oxidising and reducing agent?
nitric acid
ammonia
nitrous acid
nitrogen peroxide
Laughing gas is
nitric oxide
nitrogen peroxide
nitrogen pentoxide
nitrous oxide
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