With the help of the following reactions,arrange metals $A$,$B$,$D$,and $E$ in decreasing order of their reactivity:
$(I)$ $B + ANO_3 \to BNO_3 + A$
$(II)$ $A + HCl \to ACl + \frac{1}{2}H_2$
$(III)$ $D + ECl \to DCl + E$
$(IV)$ $D + HNO_3 \to H_2$ gas is not evolved
$(I)$ $B + ANO_3 \to BNO_3 + A$
$(II)$ $A + HCl \to ACl + \frac{1}{2}H_2$
$(III)$ $D + ECl \to DCl + E$
$(IV)$ $D + HNO_3 \to H_2$ gas is not evolved
- A$B > D > E > A$
- B$B > A > D > E$
- C$E > D > B > A$
- DNone of these
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Which of the following is a metalloid?
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View SolutionObserve the following data ($ \Delta_i H_1, \Delta_i H_2 $ and $ \Delta_{eg} H $ represent the first,second ionisation enthalpies and electron gain enthalpy respectively).
Element $ \Delta_i H_1 $ $( kJ \ mol^{-1} )$ $ \Delta_i H_2 $ $( kJ \ mol^{-1} )$ $ \Delta_{eg} H $ $( kJ \ mol^{-1} )$ $ I $ $ 520 $ $ 7300 $ $ -60 $ $ I.I $ $ 490 $ $ 3051 $ $ -48 $ $ III $ $ 1681 $ $ 3374 $ $ -328 $ $ IV $ $ 2372 $ $ 5251 $ $ +48 $
Using the data,identify the most reactive metal.
| Element | $ \Delta_i H_1 $ $( kJ \ mol^{-1} )$ | $ \Delta_i H_2 $ $( kJ \ mol^{-1} )$ | $ \Delta_{eg} H $ $( kJ \ mol^{-1} )$ |
|---|---|---|---|
| $ I $ | $ 520 $ | $ 7300 $ | $ -60 $ |
| $ I.I $ | $ 490 $ | $ 3051 $ | $ -48 $ |
| $ III $ | $ 1681 $ | $ 3374 $ | $ -328 $ |
| $ IV $ | $ 2372 $ | $ 5251 $ | $ +48 $ |
Using the data,identify the most reactive metal.
An atom of an element has an electronic configuration of $2, 8, 1$. Which of the following statements is correct?
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