1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the set containing isoelectronic species

A

$\mathrm{N}_2, \mathrm{O}_2^{2-}, \mathrm{NO}^{+}$

B

$\mathrm{N}_2, \mathrm{CO}, \mathrm{NO}^{+}$

C

$\mathrm{F}_2, \mathrm{O}_2^{2-}, \mathrm{N}_2$

D

$\mathrm{N}_2, \mathrm{O}_2^{2+}, \mathrm{C}_2$

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Choose the incorrect statement from the following.

A

At Boyle temperature a real gas obeys ideal gas law over an appreciable range of pressure.

B

Critical temperature of $\mathrm{CO}_2$ is $27.5^{\circ} \mathrm{C}$.

C

Above critical temperature, a real gas behaves like an ideal gas.

D

At room temperature and 1 atm pressure the compressibility factor $(Z)$ for $\mathrm{H}_2$ gas is greater than 1 .

3
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An ideal gas mixture of $\mathrm{C}_2 \mathrm{H}_6$ and $\mathrm{C}_2 \mathrm{H}_4$ occupies a volume of 28 L at 1 atm and 273 K . This mixture reacts completely with 128 g of $\mathrm{O}_2$ to produce $\mathrm{CO}_2$ and $\mathrm{H}_2 \mathrm{O}(l)$. What is the mole fraction of $\mathrm{C}_2 \mathrm{H}_4$ in the mixture ?

A

0.4

B

0.8

C

0.5

D

0.6

4
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Complete combustion of ethane gives only gaseous products. In a closed vessel, 15 g of ethane and 112 g of $\mathrm{O}_2$ were allowed to completely react. What is the total number of moles of gaseous substances present in the vessel at the end of the reaction?

A

4.25

B

2.5

C

1.75

D

8.50