The atomic numbers of the elements $X, Y, Z$ are $a, a+1, a+2$ respectively. $Z$ is an alkali metal. The nature of bonding in the compound formed by $X$ and $Z$ is
The sets of molecules in which central atom has no lone pair of electrons are
I. $\mathrm{SnCl}_2, \mathrm{NH}_3, \mathrm{SF}_4$
II. $\mathrm{HgCl}_2, \mathrm{SO}_3, \mathrm{SF}_6$
III. $\mathrm{BeCl}_2 \mathrm{BF}_3, \mathrm{PCl}_5$
IV. $\mathrm{ClF}_3, \mathrm{BrF}_5, \mathrm{XeF}_6$
The isobars of one mole of an ideal gas were obtained at three different pressure ( $p_1, p_2$ and $p_3$ ). The slopes of these isobars are $m_1, m_2$ and $m_3$ respectively. If $p_1 < p_2 < p_3$, then the correct relation of the slopes is
100 mL of $0.05 \mathrm{M} \mathrm{Cu}^{2+}$ aqueous solution is added to IL of 0.1 M KI solution. The number of moles of $\mathrm{I}_2$ and $\mathrm{Cu}_2 \mathrm{I}_2$ formed are respectively.
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