Chapter 15

Which of the following statement (s) is /are correct? (a) Ammonia is oxidized to \(\mathrm{NO}_{2}\) by oxygen at \(800^{\circ} \mathrm{C}\) in presence of a catalyst platinum (b) Nitric acid on standing slowly turns yellow. (c) Colloidal sulphur is formed when \(\mathrm{H}_{2} \mathrm{~S}\) gas is passed through nitric acid solution (d) \(\mathrm{N}_{2} \mathrm{O}_{3}\) gas dissolves in water giving a pale blue solution.

Buckminsterfullerene is prepared by (a) Vapourisation carbon by resistive heating (b) Passing an arc discharge between carbon electrodes in a tube containing helium at 100 torr (c) The pulsed laser vapourisation of graphite (d) None of these

The nitrogen oxide(s) that contains(s) \(\mathrm{N}-\mathrm{N}\) bond(s) is are [IIT 2009] (a) \(\mathrm{N}_{2} \mathrm{O}\) (b) \(\mathrm{N}_{2} \mathrm{O}_{3}\) (c) \(\mathrm{N}_{2} \mathrm{O}_{4}\) (d) \(\mathrm{N}_{2} \mathrm{O}_{5}\)

Which is the most thermodynamically stable allotropic from of phosphorus? (a) White (b) Black (c) Yellow (d) Red

Which is the most thermodynamically stable allotropic from of phosphorus? (a) White (b) Black (c) Yellow (d) Red

The incorrect statement about structure of white phosphorus is (a) It has four P- P single bonds. (b) It has six P- P single bonds. (c) It has PPP angle of \(60^{\circ}\) (d) It has four lone pairs of electrons.

Which statement is wrong bout structure of phosphorus (V) oxide? (a) Each 'P' atom is sp \(^{3}\) hybridized (b) It has \(6 \mathrm{P}-\mathrm{O}-\mathrm{P}\) bonds. (c) IT has POP angle of \(180^{\circ}\). (d) It has two types of \(\mathrm{P}-\mathrm{O}\) bond lengths.\(\begin{array}{llll}\text { (a) } & \text { p } & \text { q } & \text { r } \\ \text { (a) } & \text { O } & \text { O }\end{array}\) (b) \(\mathrm{O} \quad \mathrm{O}\) \(\mathrm{O} \quad \mathrm{O}\) \(\begin{array}{llll}\text { (c) } \mathrm{O} & \mathrm{O} & \mathrm{O} & \mathrm{O}\end{array}\) (d) \(\mathrm{O}\) O \(\mathrm{O} \quad \mathrm{O}\)

\text { Match the following }Column-I (Manufacturing process) (a) Deacon's process for chlorine (b) Hydrogenation of vegetable oils (c) Ostwald's process for nitric acid (d) Haber's process for ammonia\begin{aligned} &\text { Column-II } \\ &\text { (Catalyst used)l } \\ &\hline \text { (p) Finely divided } \\ &\text { iron with } \\ &\text { molybdenum as } \\ &\text { promoter } \\ &\text { (q) Copper (II) } \\ &\text { chloride } \\ &\text { (r) Finely divided } \\ &\text { nickel powder } \\ &\text { (s) Platinum gauze } \\ &\hline \end{aligned}

$$ \begin{array}{ll} \hline \text { Column-I } & \text { Column-II } \\ \hline \text { (a) Peroxide } & \text { (p) } \mathrm{C}_{3} \mathrm{O}_{2} \\\ \text { (b) Superoxide } & \text { (q) } \mathrm{PbO}_{2} \\ \text { (c) Dioxide } & \text { (r) } \mathrm{KO}_{2} \\ \text { (d) Suboxide } & \text { (s) } \mathrm{H}_{2} \mathrm{O}_{2} \\ & \text { (t) } \mathrm{RbO}_{2} \end{array} $$

$$ \begin{array}{ll} \text { Column-I } & \text { Column-II } \\ \hline \begin{array}{ll} \text { (a) } \mathrm{Sn}+\text { conc. } \mathrm{HNO}_{3} & \text { (p) NO } \\\ \text { (b) } \mathrm{Sn}+\mathrm{di} . \mathrm{HNO}_{3} & \text { (q) } \mathrm{NO}_{2} \\ \text { (c) } \mathrm{Ag}+\text { conc. } \mathrm{HNO}_{3} & \text { (r) } \mathrm{NH}_{4} \mathrm{NO}_{3} \\ \text { (d) } \mathrm{Ag}+\text { dil. } \mathrm{HNO}_{3} & \text { (s) } \mathrm{Sn}\left(\mathrm{NO}_{3}\right)_{2} \\ & \text { (t) } \mathrm{AgNO}_{3} \end{array} \\ \text { (b) } \end{array} $$

Among the following, the number of compounds than can react with \(\mathrm{PCl}_{5}\) to give \(\mathrm{POCl}_{3}\) is \(\mathrm{O}_{2}, \mathrm{CO}_{2}, \mathrm{SO}_{2}\), \(\mathrm{H}_{2} \mathrm{O}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{P}_{4} \mathrm{O}_{10}\) [IIT 2011]

The total number of diprotic acids among the following is [IIT 2010] \(\mathrm{H}_{3} \mathrm{PO}_{4} \quad \mathrm{H}_{2} \mathrm{SO}_{4} \quad \mathrm{H}_{3} \mathrm{PO}_{3} \mathrm{H}_{2} \mathrm{CO}_{3} \quad \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}\) \(\begin{array}{llll}\mathrm{H}_{3} \mathrm{BO}_{3} & \mathrm{H}_{3} \mathrm{PO}_{2} & \mathrm{H}_{2} \mathrm{CrO}_{4} & \mathrm{H}_{2} \mathrm{SO}_{3}\end{array}\)

Which of the following can act as a propellant for rockets? (a) liquid hydrogen + liquid nitrogen (b) liquid nitrogen + liquid oxygen (c) liquid hydrogen + liquid oxygen (d) liquid oxygen + liquid argon

Which one of the following substances has the highest proton affinity? [2003] (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{PH}_{3}\) (d) \(\mathrm{H}_{2} \mathrm{~S}\)

Which one of the following processes will produce hard water? (a) saturation of water with \(\mathrm{CaCO}_{3}\) (b) addition of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) to water (c) saturation of water with \(\mathrm{MgCO}_{3}\) (d) saturation of water with \(\mathrm{CaSO}_{4}\)

Which one of the following is the correct statement? [2008] (a) Boric acid is a protonic acid (b) Beryllium exhibits coordination number of six.(c) Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase. (d) \(\mathrm{B}_{2} \mathrm{H}_{6} .2 \mathrm{NH}_{3}\) is known as 'inorganic benzene'

In context with the industrial preparation of hydrogen from water gas \(\left(\mathrm{CO}+\mathrm{H}_{2}\right)\), which of the following is the correct statement? (a) \(\mathrm{CO}\) and \(\mathrm{H}_{2}\) are fractionally separated using differences in their densities (b) \(\mathrm{CO}\) is removed by absorption in aqueous \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\) solution (c) \(\mathrm{H}_{2}\) is removed through occlusion with \(\mathrm{Pd}\) (d) \(\mathrm{CO}\) is oxidized to \(\mathrm{CO}_{2}\) with steam in the presence of a catalyst followed by absorption of \(\mathrm{CO}_{2}\) in alkali.

In context with the industrial preparation of hydrogen from water gas \(\left(\mathrm{CO}+\mathrm{H}_{2}\right)\), which of the following is the correct statement? (a) \(\mathrm{CO}\) and \(\mathrm{H}_{2}\) are fractionally separated using differences in their densities (b) \(\mathrm{CO}\) is removed by absorption in aqueous \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\) solution (c) \(\mathrm{H}_{2}\) is removed through occlusion with \(\mathrm{Pd}\) (d) CO is oxidized to \(\mathrm{CO}_{2}\) with steam in the presence of a catalyst followed by absorption of \(\mathrm{CO}_{2}\) in alkali.

Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is \([2008]\) (a) \(\mathrm{R}_{4} \mathrm{Si}\) (b) \(\mathrm{RSiCl}_{3}\) (c) \(\mathrm{R}_{2} \mathrm{SiCl}_{2}\) (d) \(\mathrm{R}_{3} \mathrm{SiCl}\)

Very pure hydrogen \((99.9 \%)\) can be made by which of the following proceses? \([2008]\) (a) Reaction of methane with steam (b) Reaction of salt like hydrides with water (c) Electrolysis of water (d) Mixing natural hydrocarbons of high molecular weight

Which of the following statement about water is \(\quad\) (c) Ice formed by heavy water sinks in normal water false? \(\begin{array}{cc}\text { [2016] } & \text { (d) Water in oxidised to } \mathrm{O}_{2} \text { daring photosynthesis. }\end{array}\) (a) Water can act both as an acid and as a base. (b) There is a extensive intramolecular hydrogen bonding in the condensed phase.