Problem 127
The amount of calcium oxide required to reacts with \(852 \mathrm{~g}\) of \(\mathrm{P}_{4} \mathrm{O}_{10}\) is (a) \(18 \mathrm{~mol}\) (b) \(14 \mathrm{~mol}\) (c) \(17 \mathrm{~mol}\) (d) \(13 \mathrm{~mol}\)
Problem 128
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.
Problem 129
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.
Problem 130
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 Column-II (Catalyst used)] (p) Finely divided iron with molybdenum as promoter (q) Copper (II) chloride (r) Finely divided nickel powder (s) Platinum gauze
Problem 132
Match the following Column-I (a) Peroxide (b) Superoxide (c) Dioxide (d) Suboxide Column-II (p) \(\mathrm{C}_{3} \mathrm{O}_{2}\) (q) \(\mathrm{PbO}_{2}\) (r) \(\mathrm{KO}_{2}\) (s) \(\mathrm{H}_{2} \mathrm{O}_{2}\) (t) \(\mathrm{RbO}_{2}\)
Problem 135
Among the following, the number of compounds than can react with \(\mathrm{PCl}_{5}\) to give \(\mathrm{POCl}_{3}\) is \(\mathrm{O}_{2}, \mathrm{CO}_{2}, \mathrm{SO}_{2}\), \(\mathrm{H}_{2} \mathrm{O}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{P}_{4} \mathrm{O}_{10}\)
Problem 136
The total number of diprotic acids among the following is \(\mathrm{H}_{3} \mathrm{PO}_{4} \mathrm{H}_{2} \mathrm{SO}_{4} \quad \mathrm{H}_{3} \mathrm{PO}_{3} \quad \mathrm{H}_{2} \mathrm{CO}_{3} \quad \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}\) \(\mathrm{H}_{3} \mathrm{BO}_{3} \quad \mathrm{H}_{3} \mathrm{PO}_{2} \quad \mathrm{H}_{2} \mathrm{CrO}_{4} \quad \mathrm{H}_{2} \mathrm{SO}_{3}\).
Problem 137
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
Problem 138
Which one of the following substances has the highest proton affinity? (a) \(\mathrm{NH}_{3}\) (b) \(\mathrm{H}_{2} \mathrm{O}\) (c) \(\mathrm{PH}_{3}\) (d) \(\mathrm{H}_{2} \mathrm{~S}\)
Problem 139
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 \(\mathrm{CaSO}_{4}\)
