HCP structure is present in:

Cu and Mg both

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Solution

The correct option is B
Mg

HCP is found in Mg.

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Q. An aqueous solution containing one mole per litre of each

C u (N O_{3})_{2}, A g N O_{3}, H g_{2} (N O_{3})_{2}

and

M g (N O_{3})_{2}

, is being electrolysed by using inert electrodes. The values of standard electrode potentials in volts (reduction potentials) are

A g / A g^{+} = + 0.80, 2 H g / H g_{2}^{2 +} = + 0.79, C u / C u^{2 +} = + 0.34, M g / M g^{2 +} = - 2.37

with increasing voltage, the sequence of deposition of metals on the cathode will be

A solution containing 1 mol per litre of each $C u (N O_{3})_{2}, A g N O_{3},$ and $H g_{2} (N O_{3})_{2}$ is being electrolyzed by using inert electrodes. The values of standard electrode potentials in volts (reduction potential) are
$A g | A g^{⨁} = + 0.80, 2 H g | H g_{2}^{2 +} = + 0.79$
$C u | C u^{2 +} = + 0.34, M g | M g^{2 +} = - 2.37$
with increasing voltage, the sequence of deposition of metals at the cathode will be
(IIT-JEE, 1984)