Burglar proof safes are made of
Tungsten steel
Manganese steel
Chromium steel
Nickel steel
Correct Answer :
B. Manganese steel
Related Questions
Which of the following is a communicable disease caused by viruses?
Cholera
Dysentery
Diabetes
Measles
Which of the following is not an antibiotic?
streptomycin
terramycin
aureomycin
codein
White lead is
a basic salt
an acid salt
a double salt
a normal salt
Riboflavin deficiency causes
tongue inflammation
pellagra
night blindness
anaemia
Rooms in places infected by plague are disinfected using
bleaching powder
iodoform
sulphur dioxide
chlorine
Invert sugar is
sucrose
glucose
fructose
a mixture of glucose and fructose
A mixture of ethyl alcohol and water can be separated by
evaporation
sublimation
using a separating funnel
fractional distillation
An acid which is used as a preservative for pickles is
hydrochloric acid
citric acid
tartaric acid
acetic acid
Glass is a ______ mixture of metallic ______.
homogeneous, sulphates
heterogeneous, nitrates
heterogeneous, carbonates
homogeneous, silicates
A mixture of naphthalene and sand is separated by
evaporation
using a magnet
sublimation
sedimentation
Which of the following is called 'the King of Chemicals?
Nitric acid
Hydrochloric acid
Silver nitrate
Sulphuric acid
In the mouth, starch is converted into ______ by the action of saliva.
sucrose
glucose
fructose
mannose
Gasoline is obtained from crude petroleum by
fractional distillation
fractional crystallisation
sublimation
evaporation
Consider the following statements: Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) use in boilers
4) irrigating crops
Which of these statements are correct?
1 and 3
2 and 3
1, 2 and 4
1, 2, 3 and 4
An element which is preserved under water is
Sodium
red phosphorus
white phosphorus
sulphur
Which of the following biology laboratory?
Phenol
Benzaldehyde
Formaldehyde
Acetic acid
A substance used both as an explosive and as a germicide is
phenol
TNT
picric acid
iodoform
Vinegar is the trade name for
chloroform
acetic acid
phenol
carbon tetrachloride
The noble gas which is present in microscopic quantities in air is
xenon
krypton
argon
helium
Which among the following gases present in the air discolours brass nameplates?
Hydrogen Sulphide
Nitrogen
Carbon-di-oxide
Oxygen
The value of Avogadro Number is
6.023 x 1022
1 x 10-14
cl 6.056 x 10-6
6.023 x 1023
The process of heating steel to bright red heat and cooling suddenly by plunging it into water is known as
annealing
hardening
quenching
tempering
Optical instruments are made of
pyrex glass
flint glass
quartz glass
Crooke's glass
Leakage in Liquefied Petroleum Gas (LPG) cylinders is easily detected by adding
mercaptans
propylene
carbon disulphide
phosgene
Phosgene is a compound of
red phosphorus and oxygen
white phosphorus and oxygen
carbon monoxide and chlorine
carbon dioxide and chlorine
Nylon is made from
terephthalic acid and ethylene glycol
hexamethylene diamine and adipic acid
cellulose nitrate
cellulose acetate
Solid carbon dioxide is used
as a drying agent
as a refrigerant
as an antiseptic
as a bleaching agent
Which of the following is not a characteristic of potable water?
It must be free from suspended impurities
It must be free from harmful bacteria
It must contain traces of sodium bicarbonate
It must have a fishy odour
Even as early as 3000 BC glass was known to the
Europeans
Egyptians
Asians
Americans
Penicillin was discovered by
Alexander Fleming
Sir JJ Thomson
Dr Nessler
Sir John Russel