27
MCQ (Single Correct Answer)
Which of the following is isoelectronic pair?
A
$\mathrm{ICl}_2, \mathrm{ClO}_2$
B
$\mathrm{BrO}_2^{-}, \mathrm{BrF}_2^{+}$
C
$\mathrm{ClO}_2, \mathrm{BrF}$
D
$\mathrm{CN}^{-}, \mathrm{O}_3$
28
MCQ (Multiple Correct Answer)
If chlorine gas is passed through hot NaOH solution, two changes are observed in the oxidation number of chlorine during the reaction. These are ........... and ........... .
A
0 to +5
B
0 to +3
C
0 to $-$1
D
0 to +1
29
MCQ (Multiple Correct Answer)
Which of the following options are not in accordance with the property mentioned against them?
A
$\mathrm{F}_2>\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{I}_2$ Oxidising power
B
$\mathrm{MI}>\mathrm{MBr}>\mathrm{MCl}>\mathrm{MF}$ Ionic character of metal halide
C
$\mathrm{F}_2>\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{I}_2$ Bond dissociation enthalpy
D
$\mathrm{HI}<\mathrm{HBr}<\mathrm{HCl}<\mathrm{HF}$ Hydrogen-halogen bond strength
30
MCQ (Multiple Correct Answer)
Which of the following is correct for $\mathrm{P}_4$ molecule of white phosphorus?
A
It has 6 lone pairs of electrons
B
It has six P — P single bonds
C
It has three P — P single bonds
D
It has four Ione pairs of electrons
31
MCQ (Multiple Correct Answer)
Which of the following statements are correct?
A
Among halogens, radius ratio between iodine and fluorine is maximum.
B
Leaving $\mathrm{F}-\mathrm{F}$ bond, all halogens have weaker $X-X$ bond than $X-X^{\prime}$ bond in interhalogens.
C
Among interhalogen compounds maximum number of atoms are present in iodine fluoride.
D
Interhalogen compounds are more reactive than halogen compounds.