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NEET Questions / Chemistry / Classification of Elements and Periodicity in Properties / Introduction
In an experiment, a leaf was partially covered with black paper, and other one was exposed to light. On testing these leaves for starch, in the presence of sunlight, on may conclude that photosynthesis had occurred in
Green part of leaves
Black paper covered part of leaves
Both (a) and (b)
None of the above
Which would do maximum harm to a tree?
Loss of half of its branches
Loss of all its bark
Loss of all its leaves
Loss of half of its leaves
Which would do maximum harm to a tree?
Loss of half of its branches
Loss of all its bark
Loss of all its leaves
Loss of half of its leaves
Which is not correct for ancient plants?
They have photosynthetic pigment
They are primitive algae
They use S as hydrogen source
They release oxygen as byproduct
In half leaf experiment, a part of a leaf is enclosed in a test tube containing KOH soaked cotton, while the other half is exposed to air and then setup is placed in light for sometime. It was latter found that part of leaf which was exposed to air tested positive for starch. This indicates that
Light is essential for photosynthesis
Oxygen is liberated in photosynthesis
Water is essential for photosynthesis because in KOH soaked leaf, starch synthesis do not occurs as water reacts with KOH and it become unavailable for photosynthesis
Carbon dioxide is essential for photosynthesis because in KOH soaked leaf, starch synthesis do not occurs as is absorbed by, so is not available for photosynthesis
In half leaf experiment, a part of a leaf is enclosed in a test tube containing KOH soaked cotton, while the other half is exposed to air and then setup is placed in light for sometime. It was latter found that part of leaf which was exposed to air tested positive for starch. This indicates that
Light is essential for photosynthesis
Oxygen is liberated in photosynthesis
Water is essential for photosynthesis because in KOH soaked leaf, starch synthesis do not occurs as water reacts with KOH and it become unavailable for photosynthesis
Carbon dioxide is essential for photosynthesis because in KOH soaked leaf, starch synthesis do not occurs as is absorbed by, so is not available for photosynthesis
