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The negation of the statement ''Plants...

The negation of the statement ''Plants take in `CO_(2)` and given out `O_(2)` and give out `O_(2)`'' is

A

Plants do not take in `CO_(2)` and do not give out `O_(2)`

B

Plants do not take in `CO_(2)` or do not give out `O_(2)`

C

Plants take in `CO_(2)` and do not give out `O_(2)`

D

Plants take in `CO_(2)` or do not give out `O_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Let p = Plants take `CO_(2)`
q = Plants give out `O_(2)`
Then, given statement is `p ^^ q`
Its negation is `~(p ^^ q)= ~ p vv ~q`
i.e., plants do not take `CO_(2)` or do not given out `O_(2)`.
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Knowledge Check

  • Which do not give out O_(2)

    A
    Green algae
    B
    Blue Green algae
    C
    Green plants
    D
    Photosynthetic bacteria

  • Green plants do not give out CO_(2) during day time because they

    A
    Stone the same
    B
    Respire very slowly
    C
    Do not respire
    D
    Consume it in photosynthesis.

  • Pick out the incorrect statement regarding H_2O_2 .

    A
    `H_2O_2` is kept in waxlined bottle
    B
    `H_2O_2` acts both as oxidizing and reducing agent
    C
    It is not possible to determine its boiling point at atmospheric pressure
    D
    `H_2O_2` does not react with acidified `KMnO_4`

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