(a) water
(b) chlorophyll
(c) carbon dioxide
(d) glucose
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If a plant is releasing CO2 and taking in oxygen during the day, does it mean that there is no photosynthesis ? Justify your answer.
Release of CO2 and intake of O2 gives evidence that either photosynthesis is not taking place or its rate is too low. Normally during day time, the rate of photosynthesis...
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Oxygen liberated during photosynthesis comes from
1 Answers
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The two forms of oxygen found in the atmosphere are (a) water and ozone (b) water and oxygen (c) ozone and oxygen (d) water and carbon-dioxide
(c) ozone and oxygen
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Hydrogen and oxygen combine in the ratio of 1 : 8 by mass to form water. What mass of oxygen
It is given that the ratio of hydrogen and oxygen by mass to form water is 1:8. Then, the mass of oxygen gas required to react completely with 1g of...
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A sample of vitamic C is known to contain 2.58 ×1024 oxygen atoms. How many moles of oxygen atoms are present in the sample?
1 mole of oxygen atoms = 6.023×1023 atoms ∴Number of moles of oxygen atoms = 2.58 ×1024 / 6.022×1023 ...
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During photosynthesis in plants, the gas evolved is
the correct answer is (C) Oxygen
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How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?
When an active rnetal like Zn reacts with HCl, the gas produced burns with a pop sound which indicates that it is hydrogen gas. Zn(s) + 2HCl(aq) -----> ZnCl2(s)+ H2(g)
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Mark ‘T’ if the statement is true and ‘F’ if it is false: (i) Carbon dioxide is released during photosynthesis.
(i) Carbon dioxide is released during photosynthesis. (False) (ii) Plants which synthesise their food themselves are called saprotrophs. (False) (iii) The product of photosynthesis is not a protein. (True) (iv) Solar energy is...
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Mountaineers carry oxygen cylinders with them because (a) there is no oxygen on high mountains.
(b) there is deficiency of oxygen on mountains at high altitude.
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Which of the following gases can be used for storage of fresh sample of an oil for a long time? (A) Carbon dioxide or oxygen (B) Nitrogen or oxygen
(D) Helium or nitrogen To prevent rancidification of foods containing fats and oils, the packed food is surrounded by unreactive gas (like helium, nitrogen, etc.). The inert atmosphere thus created prevents...
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