33
MCQ (Multiple Correct Answer)
Which of the following statements are correct?
A
All the three $\mathrm{N}-\mathrm{O}$ bond lengths in $\mathrm{HNO}_3$ are equal.
B
All $\mathrm{P}-\mathrm{Cl}$ bond lengths in $\mathrm{PCl}_5$ molecule in gaseous state are equal
C
$\mathrm{P}_4$ molecule in white phosphorus have angular strain therefore white phosphorus is very reactive
D
$\mathrm{PCl}_5$ is ionic in solid state in which cation is tetrahedral and anion is octahedral.
34
MCQ (Multiple Correct Answer)
Which of the following orders are correct as per the properties mentioned against each?
A
$\mathrm{As}_2 \mathrm{O}_3<\mathrm{SiO}_2<\mathrm{P}_2 \mathrm{O}_3<\mathrm{SO}_2\quad$ Acid strength.
B
$\mathrm{AsH}_3<\mathrm{PH}_3<\mathrm{NH}_3\quad$ Enthalpy of vaporisation.
C
$\mathrm{S}<\mathrm{O}<\mathrm{Cl}<\mathrm{F}\quad$ More negative electron gain enthalpy.
D
$\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}\quad$ Thermal stability.
35
MCQ (Multiple Correct Answer)
Which of the following statements are correct?
A
$\mathrm{S}-\mathrm{S}$ bond is present in $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_6$
B
In peroxosulphuric acid $\left(\mathrm{H}_2 \mathrm{SO}_5\right)$ sulphur is in +6 oxidation state
C
Iron powder along with $\mathrm{Al}_2 \mathrm{O}_3$ and $\mathrm{K}_2 \mathrm{O}$ is used as a catalyst in the preparation of $\mathrm{NH}_3$ by Haber's process
D
Change in enthalpy is positive for the preparation of $\mathrm{SO}_3$ by catalytic oxidation of $\mathrm{SO}_2$
36
MCQ (Multiple Correct Answer)
In which of the following reactions conc. $\mathrm{H}_2 \mathrm{SO}_4$ is used as an oxidising reagent?
A
$\mathrm{CaF}_2+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{CaSO}_4+2 \mathrm{HF}$
B
$2 \mathrm{HI}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{I}_2+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}$
C
$\mathrm{Cu}+2 \mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{CuSO}_4+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}$
D
$\mathrm{NaCl}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \mathrm{NaHSO}_4+\mathrm{HCl}$
37
MCQ (Multiple Correct Answer)
Which of the following statements are true?
A
Only type of interactions between particles of noble gases are due to weak dispersion forces.
B
Ionisation enthalpy of molecular oxygen is very close to that of xenon.
C
Hydrolysis of $\mathrm{XeF}_6$ is a redox reaction.
D
Xenon fluorides are not reactive.