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In the 1930s C.B. van Niel correctly hy...

In the 1930s C.B. van Niel correctly hypothesized that oxygen atoms in the oxygen gas released by plants come from

A

`H_(2)O`

B

`CO_(2)`

C

`C_(6)H_(12)O_(6)`

D

`O_(3)`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • How long(approximate )should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane ? (Atomic weight of B =10.8 u)

    A
    6.4 hours
    B
    3.2 hours
    C
    0.8 hour
    D
    1.6 hours

  • the physical process involved in the release of molecular oxygen from leaves is

    A
    diffusion
    B
    transpiration
    C
    osmosis
    D
    capillarity

  • the physical process involved in the release of molecular oxygen from leaves is

    A
    diffusion
    B
    transpiration
    C
    osmosis
    D
    capillarity

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    Henry's law constant for oxygen and nitrogen dissolved in water at 298 K are 2.0 xx 10^(9) Pa and 5.0 xx 10^(9) Pa , respectively . A sample of water at a temperature just above 273 K was equilibrated with air (20% oxygen and 80% nitrogen ) at 1 atm. The dissolved gas was separated from a sample of this water and the dried. Determine the composition of this gas.

    Particulate and gaseous pollutants along with harmless gases are released from the thermal power plants . (a) Name any tow harmless gases released . (b) Name the most widely used device of removing particulate pollutants form the air . Explain how the device is used .

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