Related Questions

Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
Fill in the gaps : There is no such thing as chemically pure water ----nature.
A in
B of
C from
D none of these
In a rare coin collection, all coins are either pure gold or pure silver , and there is initially one gold coin for every three silver coins . With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information , how many total coins are there now in this collection (after the acquisition)?
A 40
B 50
C 70
D 90
Polymerisation process in which two or more monomers of chemically different nature take part is called
A Copolymerisation
B Addition polymerisation
C Chain polymerisation
D None of these
Calgon used in water treatment is chemically
A Sodium phosphate
B Sodium hexametaphosphate
C Calcium phosphate
D Tricresyl phosphate
When water itself combines chemically with some element or mineral it is called
A Carbonation
B Desilication
C Hydration
D Oxidation
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
A Neutralised by alkali treatment
B Left as such without any treatment
C Diluted with fresh water to reduce its acidity
D None of these
Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors.
A Beryllia
B Carborundum
C Corundum
D Thoria
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
A Element
B Compound
C Atom
D Molecule
Chemically, marble is known as
A Metamorphic rock
B Argillaceous rock
C Calcareous rock
D Siliceous rock

Next steps