Who proposed the theory that "Cells arise only from the pre-existing cells"?
- AMohl
- BVirchow
- CHaeckel
- DBrown
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Which of the following is the correct increasing order of ionic character?
If three vectors $a, b, c$ satisfy $a + b + c = 0$ and $|a| = 3, |b| = 5, |c| = 7$,then the angle between $a$ and $b$ is ............ $^\circ$.
Consider the following bromides:
The correct order of $S_N1$ reactivity is
The correct order of $S_N1$ reactivity is
Which of the following belongs to the series Gamopetalae?
The radius of Germanium $(Ge)$ nuclide is measured to be twice the radius of $_{4}^{9}\text{Be}$ . The number of nucleons in $Ge$ are
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