91Ó°ÊÓ

\(\mathrm{Cl}_{2}\) reacts with hot aqueous \(\mathrm{NaOH}\) to give: (a) \(\mathrm{NaCl}\) (b) \(\mathrm{NaClO}_{3}\) (c) \(\mathrm{NaClO}_{2}\) (d) \(\mathrm{NaCO}_{4}\)

Select the correct order of acidity: (a) HI \(>\mathrm{HBr} \quad>\mathrm{HCl}>\mathrm{HF}\) (b) \(\mathrm{HCO}_{4}>\mathrm{HBrO}_{4}>\mathrm{HIO}_{4}\) (c) \(\mathrm{HCl} \mathrm{O}<\mathrm{HBrO}<\mathrm{HIO}\)

The halogens, which are not attacked by conc. \(\mathrm{HNO}_{3}\), are: (a) \(\mathrm{F}_{2}\) (b) \(\mathrm{Cl}_{2}\) (c) \(\mathrm{Br}_{2}\) (d) \(\mathrm{I}_{2}\)

Which of the following are pseudohalide ions? (a) \(\mathrm{CNO}^{-}\) (b) \(\mathrm{OCN}^{-}\)

Which one of the following arrangements truely represent the property indicated against it? (a) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}\) bond energy (b) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}\) electronegativity (c) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}\) oxidising power (d) \(\mathrm{Br}_{2}<\mathrm{Cl}_{2}<\mathrm{F}_{2}\) electron affinity

Which one of the following arrangements does not give the correct picture of the trends indicated against it? [C.B.S.E. 2008] (a) \(\mathrm{F}_{2}>\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{I}_{2}:\) Bond dissociation energy (b) \(\mathrm{F}_{2}>\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{I}_{2}:\) Electronegativity (c) \(\mathrm{F}_{2}>\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{I}_{2}\) : Oxidising nature (d) \(\mathrm{F}_{2}>\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{I}_{2}:\) Electron gain enthalpy