1
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The bond order of $\mathrm{O}_2^{+}$is $x$. The bond orders of $\mathrm{O}_2^{-}$and $\mathrm{O}_2^{2+}$ are respectively

A
$\frac{5}{3} x, \frac{5}{6} x$
B
$\frac{3}{5} x, \frac{6}{5} x$
C
$\frac{2}{5} x, \frac{3}{5} x$
D
$\frac{5}{2} x, \frac{5}{3} x$
2
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Certain volume of oxygen gas diffuses through a porous pot in 20 seconds. Same volume of another gas, $X$ diffuses in $Y$ seconds as that of oxygen, then $X$ and $Y$ respectively are

A
$\mathrm{H}_2, 5$
B
$\mathrm{He}, 10$
C
$C O, 30$
D
$\mathrm{CO}_2, 40$
3
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is only a redox reaction but not a disproportionation reaction?

A
$4 \mathrm{H}_3 \mathrm{PO}_3 \longrightarrow 3 \mathrm{H}_3 \mathrm{PO}_4+\mathrm{PH}_3$
B
$2 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$
C
$\mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \longrightarrow 3 \mathrm{NaH}_2 \mathrm{PO}_2+\mathrm{PH}_3$
D
$\mathrm{P}_4+8 \mathrm{SOCl}_2 \longrightarrow 4 \mathrm{PCl}_3+2 \mathrm{~S}_2 \mathrm{Cl}_2+4 \mathrm{SO}_2$
4
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The enthalpies of formation of gaseous $\mathrm{N}_2 \mathrm{O}$ and NO at 298 K are 82.0 and $90.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively. The enthalpy change of the reaction

$\mathrm{N}_2 \mathrm{O}(g)+\frac{1}{2} \mathrm{O}_2(g) \longrightarrow 2 \mathrm{NO}(g)$ is

A
-74 kJ
B
+98 kJ
C
+89 kJ
D
-47 kJ
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