Question

Match the following to the correct examples: Indole            Urea Hydrolysis           ...

Match the following to the correct examples:

Indole            Urea Hydrolysis            Hydrogen Sulfide            Citrate            Vogues Proskauer      

a. Bromthylmol Blue

b. Phenol Red

c. Baritts A & B

d. Iron

e. Kovacs Reagent

Science   Biology   
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Homework Answers

Answer #1

Indole- e. Kovac's reagent.

Urea hydrolysis- b. Phenol red

Hydrogen sulfide- d. Iron.

Citrate - a. Bromothymol blue

Voges prokauer- c. Baritis A & B.

  • Indole + Kovacs reagents = yellow to cherry red.
  • Hydrolysis of urea produce Ammonia and CO2. Ammonia alkalinize medium. Detected by color change of phenyle red from light orange to magenta.
  • Bromothymol blue is the indicator in citrate test. Green to blue.
  • Barrits reagents are used in Voges proskaur test.
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