MCQ
Which metal is present in brass, bronze and German silver
- A$Zn$
- B$Mg$
- ✓$Cu$
- D$Al$
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[$A$] the physical state of $\mathrm{X}_2$ at atom temperature changes from gas to solid down the group
[$B$] decrease in $HOMO-LUMO$ gap down the group
[$C$] decrease in $\pi^*-\sigma^*$ gap down the group
[$D$] decrease in ionization energy down the group
