MCQ
Compound having planar symmetry is
- A${H_2}S{O_4}$
- B${H_2}O$
- ✓$HN{O_3}$
- D$CC{l_4}$
There are two major resonance forms of nitric acid.
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$PC{l_5}\xrightarrow{\Delta }PC{l_3} + C{l_2}$
(Molar mass of $Ca(OH)_2, Na_2SO_4$ and $CaSO_4$ are $74, 143$ and $136\, g\, mol^{-1}$ respectively; $K_{sp}$ of $Ca(OH)_2$ is $5.5 \times 10^{-6}$)
$(i)$ $1s^22s^2p^63s^1$ $(ii)$ $1s^22s^22p^64s^1$
Which of the following statements is/are false ?
$(a)$ Energy is required to change $(i)$ to $(ii)$
$(b)$ $(i)$ represents $‘Na’$ atom
$(c)$ $(i)$ and $(ii)$ represent different elements
$(d)$ More energy is required to remove one electron from $(i)$ than $(ii)$