Chemistry-
General
Easy
Question
In the titration between oxalic' acid and acidified potassium permanganate, the manganous salt formed during the reaction catalyses the reaction The manganous salt acts as:
- promoter
- positive catalyst
- auto catalyst
- none of these
The correct answer is: auto catalyst
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sin
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Physics-General
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A combination of elements is enclosed in a black box and the voltage and currents are measured across this black box The expression for applied voltage; and the current flowing in it is 
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A current source sends a current 
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