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Which of the following is not correct?...

Which of the following is not correct?

A

Robert Brown discovered the cell.

B

Schleiden and Schwann formulated the cell therory.

C

Virchow explained that cells are formed from pre-existing cells.

D

A unicellular organism carries out its life activities whithin a single cell.

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Knowledge Check

  • Which of the following is the correct statements for PH_(3) -

    A
    it is less poisonous than `NH_(3)`
    B
    it is less baisc than `NH_(3)`
    C
    electronegative of `PH_(3) gt NH_(3)`
    D
    it does not show reducing properites.

  • Which of the following is a correct statement?

    A
    Molecularity of a reaction can be fractional
    B
    Zero order reaction never stops
    C
    A first order reaction must be homogeneous
    D
    The frequency factor 'A' an Arrhenius equation `(k = Ae^(-Ea//RT))` increases with inc. in temperature.

  • Which of the following is/are correct ?

    A
    During `N_2^+` formation, one electron is removed from the bonding molecular orbitals.
    B
    During `O_2^+` formation, one electron is removed from the antibonding molecular orbitals.
    C
    During `O_2^-` formation, one electron each is added to the bonding molecular orbitals.
    D
    `O_2` is paramagnetic in nature

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