Related Questions

A certain dentist specializes in implanting gold and silver teeth in his patients mouths .He charges $ 650 for a gold tooth an $ 325. for a silver tooth. If his told fees for implanting gold and silver teeth last week were $ 15, 925 in total and he implanted five more gold teeth that silver teeth, how many teeth in total did he implant over the week?
A 33
B 32
C 31
D 34
Silver gets corroded due to ________ in air.
A Oxygen
B Hydrogen Sulphide
C Carbon dioxide
D Nitrogen
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
Find out which quotation parts of the following sentences has an error. In recent 'years', automobile emissions 'have disfigured' stone 'carvings', corroded bronze monuments, and 'soil' ancient buildings.
A years
B have disfigured
C carving
D soil
Gunmetal and bronze are not corroded by the action of
A Wet chlorine
B Synthetic detergent solution
C Hydrochloric acid (10%)
D Nitric acid (
Rubber lined vessels are corroded by the action of
A Aqua regia
B Chloroform
C Sulphuric acid (95%)
D All of the above
Polythene (low or high density) containers are not corroded by
A Sulphuric acid (10%) at room temperature
B Nitric acid (95%) at room temperature
C Sulphur trioxide at 60°C
D Any of these
Glass is corroded by
A Fluorine (dry or wet)
B Sulphuric acid
C Phosphoric acid
D None of these
Graphite is corroded by
A Sulphuric acid (10%)
B Sea water
C Hydrochloric acid
D None of these
Stainless steel is not corroded by
A Hydrochloric acid (10%)
B Nitric acid (10%)
C Sulphuric acid (10%)
D Saturated brine

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