Which of the following metals is the best conductor of heat and electricity?
Aluminium
Silver
Copper
Magnesium
Correct Answer :
B. Silver
Related Questions
Sulphur is readily soluble in
Water
Alcohol
Carbon-di-sulphide
Sodium chloride solution
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion
Which of the following act a both u oxidising and reducing agent?
nitric acid
ammonia
nitrous acid
nitrogen peroxide
CAN is used as (Calcium Ammonium Nitrate)
an explosive
a fertilizer
a dye
a bleaching agent
Triple Antigen treatment for children is to ward off
whooping cough
tetanus
diphtheria
All the three
Lunar caustic is
calcium sulphate
ammonium chloride
caustic soda
silver nitrate
Marble is
calcium carbonate
sodium carbonate
magnesium sulphate
ferric chloride
The compound used in photography is
ammonium dichromate
copper Sulphate
magnesium Sulphate
sodium thiosulphate
The poisonous nature of carbon monoxide is due to
cutting off supply of oxygen
it™s being converted into carbon dioxide
its combination with haemoglobin of blood
its blocking of vocal chords
The function of nitrogen in air is
to make air a moderate supporter of combustion
to maintain the density of air constant
to prevent the hydrogen in air from exploding
to reduce the poisonous nature of ozone in air
Rusting of iron cannot be prevented by
painting
applying alkaline phosphate
applying soap water
galvanising
An acid which is used as a preservative for pickles is
hydrochloric acid
citric acid
tartaric acid
acetic acid
Which of the following is a mixture?
Baking soda
Milk
Chloroform
Copper wire
Rayon la made from
cotton
wool
cellulose
silk
A hormone which contains iodine is
adrenalin
glucagon
epinephrin
thyroxin
The commonest ore of aluminium is
cryolite
bauxite
malachite
azurite
The depletion of the ozone layer in the upper atmosphere is due to -extensive use of
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
What is 'oxygen mixture'?
A mixture of potassium nitrate and carbon
A mixture of ammonium chloride and sodium nitrate
A mixture of potassium chlorate and manganese dioxide
A mixture of ammonium nitrate and charcoal
The Combined Gas Law equation is
P1V1T1 = P2 V2 T2
P1V1T2 = P2V2T1
P = P1 + P2 + P3
C =
Which of the following biology laboratory?
Phenol
Benzaldehyde
Formaldehyde
Acetic acid
A non-metal which is a good conductor or heat and electricity is
iodine
sulphur
graphite
phosphorus
Riboflavin deficiency causes
tongue inflammation
pellagra
night blindness
anaemia
Nitrous oxide used as anaesthetic is usually mixed with
ethyl alcohol
chloroform
oxygen
methyl alcohol
Tincture iodine is
a disinfectant
an analgesic
a hypnotic
a dye
The ore of iron is
Dolomite
Magnetite
Bauxite
Anglesite
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
Which of the following types of water gives lather easily with soap?
Hard water
Heavy water
Soft water
Both (a) and (b)
Brass contains
copper and tin
aluminium and magnesium
copper and zinc
copper, tin and zinc
Bordeaux mixture contains
copper sulphate and water
copper sulphate, lime and water
thio-urea and lime
copper sulphate and thio-urea
In the nitrogen cycle, denitrifying bacteria
oxidise ammonia to nitrates
convert nitrogen into ammonia
oxidise ammonia to free nitrogen
oxidise ammonia to oxides of nitrogen