BIOLOGY
PROTEINS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Red-colored complexes with silver
|
|
|
Red-colored complexes with copper
|
|
|
Red-colored complexes with mercury
|
|
|
yellow-colored complexes with copper
|
Detailed explanation-1: -Nitrophenol, 4-The alpha form is colorless pillars, unstable at room temperature, and stable toward sunlight. The beta form is yellow pillars, stable at room temperature, and gradually turns red upon irradiation of sunlight.
Detailed explanation-2: -p-nitrophenol changes from colorless to yellow around pH = 6, while the phenolphthalein changes from colorless to pink around pH = 9. Mixing these two substances creates an indicator that changes from colorless to yellow at pH = 6, and then from yellow to red at pH = 9 (Table 1).
Detailed explanation-3: -4-nitrophenol appears as a white to light yellow crystalline solid. Contact may severely irritate skin and eyes. Poisonous by ingestion and moderately toxic by skin contact. COLOURLESS-TO-PALE-YELLOW CRYSTALS.
Detailed explanation-4: -Answer: P-nitrophenol shows a red shift in an alkaline medium because of a phenomenon called Bathochromic shift.