1
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
If the density of a mixture of nitrogen and oxygen gases at 400 K and l atm pressure is $0.920 \mathrm{gL}^{-1}$, what is the mole fraction of nitrogen in the mixture? ( $R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$; assume ideal gas behaviour for oxygen and nitrogen)
A
0.456
B
0.554
C
0.432
D
0.568
2
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The incorrect rule regarding the determination of significant figures is
A
zeros preceeding to first non-zero digit are not significant.
B
zeros between two non-zero digits are not significant.
C
zeros at the right end of the number are significant if they are on the right side of decimal point.
D
All non-zero digits are significant.
3
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
At 61 K , one mole of an ideal gas of 1.0 L volume expands isothermally and reversibly to a final volume of 10.0 L . What is the work done in the expansion?
A
-11.52 L atm
B
-23.04 L atm
C
-46.08 L atm
D
-5.76 L atm
4
TG EAPCET 2024 (Online) 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
At $T(\mathrm{~K}), K_C$ for the dissociation of $\mathrm{PCl}_5$ is $2 \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$. The number of moles of $\mathrm{PCl}_5$ that must be taken in 1.0 L flask at the same temperature to get 0.2 mol of chlorine at equilibrium is
A
2.2
B
1.1
C
1.8
D
4.4
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