1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A system does 394 J of work on surrounding by absorbing 701 J heat. What is the change in internal energy of the system?

A
547 J
B
1095 J
C
307 J
D
394 J
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Formation of $$\mathrm{NO}_{2(\mathrm{g})}$$ from $$\mathrm{N}_{2(\mathrm{g})}$$ and $$\mathrm{O}_{2(\mathrm{g})}$$ is an endothermic process. Which of the following is true for this reaction?

A
$$\Delta \mathrm{H}=0$$
B
$$\Delta \mathrm{H}<0$$
C
$$\Delta \mathrm{H}=\Delta \mathrm{U}$$
D
$$\Delta \mathrm{H}>0$$
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is enthalpy of formation of $$\mathrm{NH}_3$$ if bond enthalpies are as $$(\mathrm{N} \equiv \mathrm{N})=941 \mathrm{~kJ},(\mathrm{H}-\mathrm{H})=436 \mathrm{~kJ},(\mathrm{N}-\mathrm{H})=389 \mathrm{~kJ}$$ ?

A
$$-84.5 \mathrm{~kJ}$$
B
$$-21.25 \mathrm{~kJ}$$
C
$$-42.5 \mathrm{~kJ}$$
D
$$-63.45 \mathrm{~kJ}$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the difference between $$\Delta H$$ and $$\Delta \mathrm{U}$$ for reaction given below at $$298 \mathrm{~K}$$ ?

($$\mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$$

$$2 \mathrm{C}_6 \mathrm{H}_{6(\ell)}+15 \mathrm{O}_{2(\mathrm{~g})} \rightarrow 12 \mathrm{CO}_{2(\mathrm{~g})}+6 \mathrm{H}_2 \mathrm{O}_{(\ell)}$$

A
$$-2.72 \mathrm{~kJ}$$
B
$$-7.43 \mathrm{~kJ}$$
C
$$-7.8 \mathrm{~kJ}$$
D
$$-3.72 \mathrm{~kJ}$$
MHT CET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12