A) In a first order reaction, the half-life is independent of the initial concentration of reactant.
B) A given piece of charcoal shows increase in its surface area in its powdered form.
C) In valence bond of\[{{H}_{2}},\]each electron spends its time around its own nucleus.
D) In valence bond of\[{{H}_{2}},\]both the electrons spend their time around both the nucleus.
Correct Answer: C
Solution :
(i) For first order reaction, \[{{t}_{1/2}}=\frac{0.693}{k}\]where,\[{{t}_{1/2}}=\]half-life period. \[k=\]rate constant So, the half life period of first order reaction is independent of the initial concentration of reactant. (ii) A given piece of charcoal shows increase in its surface area in its powdered form. (iii) Two electrons, one belonging to each atom originally, spend maximum time in the region of overlap and thus, are attracted simultaneously by the two nuclei.
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