Related Questions

A catalytic agent such platinum may be used so that the chemical reaction reaction more rapidly .
A such
B that
C reaction
D rapidly
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
A Increases
B Decreases
C Remains constant
D Increases exponentially
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A High cost
B Fragile nature
C Easy poisoning tendency
D All of the above
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?
A 0.1
B 3
C 13
D 29
What dose the underlined phrase mean in the following sentence? "The platinum fob chain proclaimed its value by substance alone and not by meretricious ornamentation "
A Outward glitter
B surface decoration
C False decoration
D Superb decoration
Fill in the gap with correct word in the sentence 'Which would you ____ have, gold or platinum ? '
A prefer
B could
C rather
D better
Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of
A Carbon
B Arsenic
C Lead
D Sulphur
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
A Conversion of CO into CO2 in the second compartment
B Conversion of NOx into N2 and NH3 in the first compartment
C Oxidation of unburnt hydrocarbon fuel in the second compartment
D All of the above
Platinum and silver are corroded by
A Caustic soda solution
B Phosphoric acid
C Sulphuric acid (10%)
D None of these
For platinum thermocouples, lead wires are made of
A Copper & copper-nickel alloys
B Copper & iron
C Iron & nickel
D Tin & nickel

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