Concrete is a mixture of
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
Correct Answer :
D. cement, sand and gravel
Related Questions
Marsh gas is
ethane
ethylene
acetylene
methane
Even as early as 3000 BC glass was known to the
Europeans
Egyptians
Asians
Americans
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
Proteins are polymerisation products of
aldehydes
alkenes
amino acids
alkynes
Triple Antigen treatment for children is to ward off
whooping cough
tetanus
diphtheria
All the three
PAS is a drug used In the treatment of
tuberculosis
cancer
typhoid
malaria
Which of the following is not an antibiotic?
streptomycin
terramycin
aureomycin
codein
An acid which is used as a preservative for pickles is
hydrochloric acid
citric acid
tartaric acid
acetic acid
The process of heating steel to bright red heat and cooling suddenly by plunging it into water is known as
annealing
hardening
quenching
tempering
Penicillin was discovered by
Alexander Fleming
Sir JJ Thomson
Dr Nessler
Sir John Russel
A mixture of ethyl alcohol and water can be separated by
evaporation
sublimation
using a separating funnel
fractional distillation
Clark's method for removal of temporary hardness in water uses
calcium hydroxide
washing soda
calcium chloride
zeolite
Which of the following is an essential constituent of acids?
Oxygen
Nitrogen
Hydrogen
Chlorine
Oil of winter green contains
acetone
ether
acetic acid
methyl salicylate
Carbogen is used in
CO2 poisoning
CO poisoning
phosgene poisoning
anesthesia
Leakage in Liquefied Petroleum Gas (LPG) cylinders is easily detected by adding
mercaptans
propylene
carbon disulphide
phosgene
The pure at form of iron is
wrought iron
steel
pig iron
nickel steel
The modern system of symbols was evolved by
Dalton
Cavendish
Avogadro
Berzelius
Ozone occurs in the upper layers of air in the atmosphere because
it is lighter than air
in the lower layers it becomes unstable
ultra-violet light is present only in the upper layers
it mixes freely with O2 in the upper layers
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
Vinegar is an aqueous solution of
oxalic acid
citric acid
acetic acid
hydrochloric acid
Sulphur is readily soluble in
Water
Alcohol
Carbon-di-sulphide
Sodium chloride solution
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
A compound of carbon used as anaesthetic is
carbon disulphide
carbon tetrachloride
phosgene
chloroform
The main element used in the vulcani-sation of rubber is
nickel
copper
sulphur
graphite
Solid carbon dioxide (Dry ice) is also known as
Thiokol
Drikold
Perhydrol
Mannitol
The best specimen for drinking purposes is
rain water
river water
conductivity water
deep well water
A light alloy having high tensile strength is
German silver
solder
magnalium
bell metal
The value of Avogadro Number is
6.023 x 1022
1 x 10-14
cl 6.056 x 10-6
6.023 x 1023
Dry Ice is
solid carbon dioxide
liquid oxygen
liquid hydrogen
liquid. Chlorine