Question

A limited reagent in a chemical reaction is------

A. A reagent in excess

B. A reagent that runs out first

C. A reagent that remains at the end

D. A reagent that is always solid material

Answer 1

limited reagent is the reagents which is consumed completly during the chemical reaction, lets explain this by using example

NaOH + HCl --> NaCl + H2O

this is the neutralisation reaction

in this reaction lets suppose we have 1 mole of NaOH in beaker and 2 moles of HCl

when the reaction starts

HCl starts reacting with NaOH

at the end of reaction all the moles of HCl (1 mole ) gets reacted with 1 mole of NaOH,

now we have no more HCl in beaker, so we have only 1 mole of NaOH in the beaker

hence here we have HCl as a limiting reagent.

NaOH is in excess so it cant be limiting reagent so A cant be answer

HCl ends (runs out first ) so B is the answer

limiting reagent never remains at the end, it gets consumed completly

so C cant be the answer

and no matter in which state reagent is, so D also cant be the answer

finally Bis the answer