Atomic Structure · JEE Main previous year questions

2002 2 questions

1. Q1522002 · 27 Apr 2002 · Shift 1

   Uncertainty in position of a minute particle of mass 25 g in space is $10^{-5}$ m. What is the uncertainty in its velocity (in $\mathrm{m}{\mathrm{s}}^{-1}$) (h = $6.6\times 10^{-34}$ Js)

   1. A.$2.4\times 10^{-34}$
   2. B.$0.5\times 10^{-34}$
   3. C.$2.1\times 10^{-28}$
   4. D.$0.5\times 10^{-23}$
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   Answer: C

2. Q1932002 · 27 Apr 2002 · Shift 1

   A square planar complex is formed by hybridisation of which atomic orbitals ?

   1. A.s, $p_x$, $p_y$, $d_{xy}$
   2. B.s, $p_x$, $p_y$, $d_{x^2-y^2}$
   3. C.s, $p_x$, $p_y$, $d_{z^2}$
   4. D.s, $p_x$, $p_y$, $d_{yz}$
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   Answer: B