Class 10 · Science · 8 experiments
Pick an experiment to enter the virtual lab.
NCERT Activity 5.1: Boil a leaf in water, decolorize in alcohol, rinse, then add iodine. Blue-black colour confirms starch — evidence of photosynthesis.
NCERT Activity 5.2: Iodine test on a variegated leaf — only green patches turn blue-black, proving chlorophyll is essential for photosynthesis.
NCERT Activity 5.3: KOH absorbs CO₂ in a bell jar — plant can't photosynthesize. Control plant with CO₂ produces starch. Proves CO₂ is essential.
NCERT Activity 5.4: Germinating seeds turn lime water milky (CO₂ released), boiled seeds don't. Proves respiration occurs only in living cells.
NCERT Activity 5.5: Observe Amoeba's holozoic nutrition — pseudopodia engulf food, forming a food vacuole for digestion, absorption, and egestion.
NCERT Activity 5.6: Observe Paramecium's holozoic nutrition — cilia sweep food into the oral groove, through the gullet, forming a food vacuole for digestion.
NCERT Activity 5.7: Cover a potted plant with a polythene bag — water droplets appear inside (transpiration). Leafless control shows no droplets.
NCERT Activity 5.8: Place a stem in red-coloured water — only xylem vessels turn red, proving xylem transports water upward. Leaf veins also turn red.