1
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Use the data from table to estimate the enthalpy of formation of $$\mathrm{CH}_3 \mathrm{CHO}$$.

Bond enthalpy Bond Enthalpy of formation
$$\mathrm{400~kJ~mol^{-1}}$$ $$\mathrm{C-H}$$ $$\mathrm{C}(\mathrm{g}) 700 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
$$\mathrm{350~kJ~mol^{-1}}$$ $$\mathrm{C-C}$$ $$\mathrm{H}(\mathrm{g}) 200 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
$$\mathrm{700~kJ~mol^{-1}}$$ $$\mathrm{C=O}$$ $$\mathrm{O}(\mathrm{g}) 250 \mathrm{~kJ} \mathrm{~mol}^{-1}$$

A
$$-200$$ kJ mol$$^{-1}$$
B
$$-400$$ kJ mol$$^{-1}$$
C
$$-350$$ kJ mol$$^{-1}$$
D
$$-150$$ kJ mol$$^{-1}$$
2
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

At 500 K , for the reaction $$\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g})$$, the $$K_p$$ is $$0.036 \mathrm{~atm}^{-2}$$. What is its $$K_C$$ in $$\mathrm{L}^2 \mathrm{~mol}^{-1}$$ ? $$\left(R=0.082 \mathrm{~L}^2\right.$$ atom $$\left.\mathrm{mol}^{-1} \mathrm{~K}^{-1}\right)$$.

A
$$2.1 \times 10^{-4}$$
B
$$2.1 \times 10^{-5}$$
C
60.5
D
605
3
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The relative basic strength of the compounds is correctly shown in the option.

A
$$\mathrm{NH}_2 \mathrm{OH}>\mathrm{NH}_3>\mathrm{N}_2 \mathrm{H}_4$$
B
$$\mathrm{N}_2 \mathrm{H}_4>\mathrm{NH}_2 \mathrm{OH}>\mathrm{NH}_3$$
C
$$\mathrm{NH}_3>\mathrm{N}_2 \mathrm{H}_4>\mathrm{NH}_2 \mathrm{OH}$$
D
$$\mathrm{N}_2 \mathrm{H}_4>\mathrm{NH}_3>\mathrm{NH}_2 \mathrm{OH}$$
4
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calcium carbide $$+\mathrm{D}_2 \mathrm{O} \longrightarrow \underline{X}+\mathrm{Ca}(\mathrm{OD})_2$$. The hybridisation of carbon atom(s) in $$X$$

A
$$s p^2$$
B
$$s p$$
C
$$s p^3$$
D
$$d s p^2$$
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