The alloy added in the preparation of steel contains
Fe and C
Mn and C
Fe and Mn
Fe, Mn and C
Correct Answer :
D. Fe, Mn and C
Related Questions
An antipyretic is a drug used
in the treatment of malaria
to relieve sleepiness
to induce sleep
to lower body temperature
Which one of the following is not radioactive?
Astatine
Francium
Tritium
Zirconium
An example of stimulant fertilizer is
gypsum
urea
potassium nitrate
ammonium phosphate
A compound used both as a fungicide and as a disinfectant is
chlorine
carbon monoxide
sulphur dioxide
o-cresol
The percentage of silver in German silver is
ten
twenty
zero
fifty
An acid which is used as a preservative for pickles is
hydrochloric acid
citric acid
tartaric acid
acetic acid
Coke is a substance obtained
from coal mines
when wood is burnt in excess of air
by heating coal out of contact with air
by heating wood out to contact with air
The compound which is both an antiseptic and a disinfectant is
phenol
iodoform
bleaching powder
blue vitriol
Which is the 'odd man' in the following?
brass
common salt
cane sugar
water
Even as early as 3000 BC glass was known to the
Europeans
Egyptians
Asians
Americans
Clark's method for removal of temporary hardness in water uses
calcium hydroxide
washing soda
calcium chloride
zeolite
In the mouth, starch is converted into ______ by the action of saliva.
sucrose
glucose
fructose
mannose
Which of the following is a halogen?
Radon
Astatine
Cesium
Ruthenium
The scientist who synthesised the first organic compound (urea) in the laboratory was
Wohler
Dalton
Lavoisier
Fischer
Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because otherwise
it becomes coloured
it gets evaporated in air
it gets oxidised to phosgene
it gets decomposed to chloropicrin
Riboflavin deficiency causes
tongue inflammation
pellagra
night blindness
anaemia
Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the
Law of Multiple Proportions
Law of Definite Proportions
Law of Conservation of Mass
Law of Reciprocal Proportions
Oxalic acid is used in the manufacture of
tincture iodine
paints
ink
aerated water
Two or more entirely different compounds having the same molecular formula are known as
isobars
isotopes
isomorphs
isomers
The compound used in photography is
ammonium dichromate
copper Sulphate
magnesium Sulphate
sodium thiosulphate
Which one of the following is used for dry cleaning?
Kerosene oil
Diesel oil
Lubricating oil
Petroleum ether
The addition of a neutron to the nucleus of an atom
increases the atomic mass of the atom
decreases the atomic mass of the atom
increases the charge on the nucleus
decreases the charge on the nucleus
Which of the following metals is the best conductor of heat and electricity?
Aluminium
Silver
Copper
Magnesium
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
Which of the following is an essential constituent of acids?
Oxygen
Nitrogen
Hydrogen
Chlorine
The gas which has a faint sweet odour is
nitrogen
nitrous oxide
nitric oxide
nitrogen peroxide
The main element used in the vulcani-sation of rubber is
nickel
copper
sulphur
graphite
Boiler scales' contain
calcium carbonate
magnesium bicarbonate
calcium sulphate
magnesium sulphate
A metal which is extracted by thermal reduction is
nickel
aluminium
mercury
calcium
Physico-chemical characteristics of water in water sources undergo changes due to
aquatic macrophytes
aquatic fungi
effluents
evapotranspiration