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Chemistry Test ...

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  • Question 1
    1 / -0

    If the nitrogen atom had electronic configuration 1s7, it would have energy lower than that of the normal ground state configuration 1s2 2s2 2p3, because the electrons would be closer to the nucleus, yet 1s7 is not observed because it violates

  • Question 2
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    \(\mathrm{Ph}-\mathrm{CH}_{2}-\mathrm{C} \equiv \mathrm{CH} \underset{\mathrm{Y}}{\stackrel{\mathrm{X}}{\rightleftarrows}} \mathrm{Ph}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3}\)
    The reagents \(X\) and \(Y\) respectively are

  • Question 3
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    The first orbital of \(\mathrm{H}\) is represented by \(: \psi=\frac{1}{\sqrt{\pi}}\left(\frac{1}{a_{0}}\right)^{3 / 2} \mathrm{e}^{-\mathrm{r} / a_{0}},\) where \(\mathrm{a}_{0}\) is Bohr's radius. The probability of finding the electron at a distance \(r\), from the nucleus in the region \(d V\) is :

  • Question 4
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    Following is the graph between log t1/2 and log a (a = initial concentration) for a given reaction at 27oC. Hence, order is :

  • Question 5
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    Amongst the following, the most basic compound is

  • Question 6
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    \(\mathrm{ }_{11}^{23}{Na}\) is the more stable isotope of Na. Find out the process by which \({ }_{11}^{24} \mathrm{Na}\) can undergo radioactive decay.

  • Question 7
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    The reagent with which both acetaldehyde and acetone react easily is

  • Question 8
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    Two organic compounds A and B both containing C and H yield on analysis, the same percentage composition by weight, C=(12/13)×100; H=(1/13)×100. Which among the following will be the correct formula of the compounds 'A' and 'B' ? ('A' decolourises bromine water but 'B' does not)

  • Question 9
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    When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is

  • Question 10
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    20% of N2O4 molecules are dissociated in a sample of gas at 27∘C and 760 torr. Mixture has the density at equilibrium equal to:

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