Artificial diamonds were produced by
Moissan
Davy
Faraday
Marie Curie
Correct Answer :
A. Moissan
Related Questions
Which among the following is a solid non-metal?
chlorine
mercury
water
iodine
The scientist associated with the discovery of the nucleus was
Rutherford
Moseley
Niels Bohr
J.J. Thomson
Compounds of nitrogen with metals are called
nitrates
nitrites
hyponitrates
nitrides
In photography, the compound or nitrogen used is
Potassium nitrate
Silver nitrate
Ammonium carbonate
Ammonium bicarbonate
Galvanising is coating Iron with
nickel
zinc
chromium
copper
Which of the following is used as an illuminant?
Gasoline
Benzoline
Kerosene
Petroleum ether
Clark's method for removal of temporary hardness in water uses
calcium hydroxide
washing soda
calcium chloride
zeolite
The rate of setting of cement is slowed down by the addition of
quicklime
gypsum
soda lime
bleaching powder
Cholesterol is
a carbohydrate
a protein
a lipid
a hormone
An essential condition for rusting is
high temperature
light
moisture
dry air
Which of the following la a very good supporter of combustion?
Carbon monoxide
Oxygen
Nitrogen
Hydrogen
The foul odour of gasoline is due to
pyridine
hydrogen sulphide
cacodyl
carbylamines
Tincture iodine is a solution of
iodine in potassium iodide
iodine in alcohol
iodine in water
iodine in carbon disulphide
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 term 'nucleons' apples to
neutrons
protons
protons and neutrons
protons and electrons
The formula for cane sugar is
C6H12O6
C2H5OH
C12H22O11
C7H8O
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion
Which of the following is used in fuel to propel rockets?
Petrol
Kerosene
Hydrazine
Alcohol
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'
The compound used in photography is
ammonium dichromate
copper Sulphate
magnesium Sulphate
sodium thiosulphate
The raw materials used in the manufacture of cement are
brimstone and silica
limestone and clay
brimstone and clay
brimstone and limestone
Rayon la made from
cotton
wool
cellulose
silk
Vinegar is an aqueous solution of
oxalic acid
citric acid
acetic acid
hydrochloric acid
Mild steel contains
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
Beri-beri is caused by deficiency of Vitamin
A
C
B12
B1
Which of the following is a halogen?
Radon
Astatine
Cesium
Ruthenium
Nylon is made from
terephthalic acid and ethylene glycol
hexamethylene diamine and adipic acid
cellulose nitrate
cellulose acetate
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
Proteins are polymerisation products of
aldehydes
alkenes
amino acids
alkynes
The value of Avogadro Number is
6.023 x 1022
1 x 10-14
cl 6.056 x 10-6
6.023 x 1023