MCQ
Main constituent of marsh gas is
- A${C_2}{H_2}$
- ✓$C{H_4}$
- C${H_2}S$
- D$CO$
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$(I)$ $Be$ has smaller atomic radius compared to $Mg$
$(II)$ $Be$ has higher ionization enthalpy than $Al.$
$(III)$ Charge/radius ratio of $Be$ is greater than that of $Al$.
$(IV)$ Both Be and $Al$ form mainly covalent compounds.
