alleryIodine is used in the starch test because in presence of starch it
ATurns pink-violet like permanganate
BTurns red-brown like rust
CTurns blue-black
DTurns yellow-green like chlorine water
Answer & Solution
Correct answer: C. Turns blue-black
1. Iodine binds the amylose chains of starch.
2. The bound iodine absorbs visible light differently.
3. The visible result is a deep blue-black colour.
4. So iodine indicates starch by turning blue-black.
_Source: Selina Concise Biology Class 10, Ch on Photosynthesis (Mistral OCR'd PDF), section on starch test_
Keep practising Life Processes & Human Physiology
Browse all Life Processes & Human Physiology questions for Andhra Pradesh SSC (Class 10), or explore more Biology topics.
Related questions
The fluid inside the nucleus is called:Plant cells differ from animal cells in possessing:Endoplasmic reticulum is of how many types?Which organelle has its own DNA?Skin excretesThe renal vein leaving the kidney carries blood that isBlood that enters the kidney through the renal artery isIf a kidney fails, the body removes wastes using a process called