Which of the following dye is colourless at acidic pH and becomes red – McqOptions

MCQOPTIONS

1.	Which of the following dye is colourless at acidic pH and becomes red at basic pH?
A.	Methyl red
B.	Thymol blue
C.	Phenolphthalein
D.	Phenol red
Answer» D. Phenol red

Discussion

No Comment Found

Related MCQs

Which of the following method is useful for detection and isolation of those microorganisms which are capable of growing on a particular nutrient medium?
A test tube contains 9ml distilled water. 1g of soil is added to that test tube and the soil is allowed to settle down. Now, 1ml of that stock solution is taken and transferred to the 2nd test tube containing 9ml of distilled water. The process is repeated several times until the requirement is met. For this dilution, it may be said that the solution was diluted _______
Which of the following plate is used to detect and isolate organic acid producers?
Which of the following dye is colourless at acidic pH and becomes red at basic pH?
Which of the following method proceeds with 2-plate preparation?
What is the pH range of Bromophenol blue?
Which of the following method is useful for isolation and detection of organisms having the ability to produce organic acids?
The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves.
Which of the following method is useful for isolation and detection of organisms having the ability to produce growth factors?
Which of the following shows the zone of inhibition when a particular organism is grown on a Petri plate?