The raw materials required for the manufacture of glass are
silica, sodium nitrate and soda ash
silica, limestone and sodium nitrate
silica, sodium oxide and limestone
silica, soda ash and limestone
Correct Answer :
D. silica, soda ash and limestone
Related Questions
Which of the following is not an antibiotic?
streptomycin
terramycin
aureomycin
codein
In the common soda-acid fire extinguisher, the fire is put out by
acid fumes
sodium bicarbonate
carbon dioxide
sodium carbonate
A metal which occurs 'free' in nature is
gold
zinc
tin
molybdenum
Which of the following is not a physical change?
Distillation of water
Action of heat on potassium chlorate
Powdering of glass
Burning of an electric lamp
The gas which has a faint sweet odour is
nitrogen
nitrous oxide
nitric oxide
nitrogen peroxide
Galvanising is coating Iron with
nickel
zinc
chromium
copper
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
Mild steel contains
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?
Aluminium
Chromium
Nickel
Tungsten
The compound of iron used in the manufacture of blue-black ink is
ferric chloride
ferric sulphate
ferric thiocyanate
ferrous sulphate
Temporary hardness is due to the presence of
calcium carbonate
calcium bicarbonate
magnesium sulphate
calcium sulphate
In photography, the compound or nitrogen used is
Potassium nitrate
Silver nitrate
Ammonium carbonate
Ammonium bicarbonate
Which of the following act a both u oxidising and reducing agent?
nitric acid
ammonia
nitrous acid
nitrogen peroxide
Which of the following cannot be used as fuel?
Gasoline
Kerosene
Sulphuric acid
Alcohol
Cinnabar is an ore of
lead
zinc
mercury
chromium
Isotopes differ in the number of
Protons
Neutrons
Electrons
Protons and electrons
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'
Refined petroleum is decolourised by
manganese dioxide
bauxite
animal charcoal
quicklime
Which of the following is used in fuel to propel rockets?
Petrol
Kerosene
Hydrazine
Alcohol
Hydrogen gas has
a very sweet smell
a very pungent smell
an irritating smell
no smell at all
The vitamin that is found in citrus fruits such as lemon and orange is
vitamin C
vitamin B2
vitamin A
vitamin E
Apart from lead tetra-ethyl, the other compound used as antiknock is
n-heptane
n-octane
iso-heptane
iso-octane
The fertilizer which has the largest percentage of nitrogen is
urea
ammonium nitrate
ammonium sulphate
calcium cyanamide
The purest form of carbon is
animal charcoal
coal
wood charcoal
sugar charcoal
Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to
dehydration
oxidation
reduction
dehydrogenation
Solder is an alloy of
tin and copper
tin and lead
tin and zinc
tin, copper and zinc
The main constituent of gobar gas is
methane
nitrogen
carbondioxide
ethylene
Graphite la a good conductor of electricity because
it is an allotrope of carbon
it gives CO2 on heating
it contains free electrons
it is oxidised to graphitic acid
Deficiency of iron causes
nervous disorders
heart diseases
anaemia
impairment of vision
The first organic compound prepared in the laboratory was
acetic acid
chloroform
urea
methane