MCQ
The space between proton and electron in hydrogen atom is :
- ✓Absolutely empty
- BFull of electromagnetic radiation
- CFull of air
- DFull of Ether
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($A$) $R$ is steam volatile
($B$) $Q$ gives dark violet coloration with $1 \%$ aqueous $FeCl_3$ solution
($C$) $S$ gives yellow precipitate with $2, 4$-dinitrophenylhydrazine
($D$) $S$ gives dark violet coloration with $1 \%$ aqueous $FeCl_3$ solution
$(I)$ $\phi -CH_3$
$(II)$ $\phi -CH_2-CH_3$
$(III)$ $\phi -CH(CH_3)_2$
$(IV)$ $\phi-C(CH_3)_3$
towards electrophilic substitution will be - [where $\phi =C_6H_5$]