1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Identify the final product formed when benzenamine reacts with the given reagents in the sequential order as:

i. $\quad\left(\mathrm{CH}_3-\mathrm{CO}\right)_2 \mathrm{O} /$ Pyridine.

ii.      Conc. $\mathrm{HNO}_3+\mathrm{H}_2 \mathrm{SO}_4$ \& then reacted with $\mathrm{H}_3 \mathrm{O}^{+}$

iii. $\quad \mathrm{NaNO}_2 \mathrm{HCl}(273 \mathrm{~K})$ \& then reacted with $\mathrm{H}_3 \mathrm{PO}_2(\mathrm{aq})$.

A

2- Chloro- 4-Nitrophenol

B

4-Chloro-2-Nitroaniline

C

Nitrobenzene

D

4-Nitrophenol

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Identify the law which is stated as "For any solutions, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction".

A

Raoult's law

B

Henry's law

C

Gay-Lussac's law

D

Dalton's law

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is correct?

A

Heisenberg uncertainty principle can be applied to all the objects and for macroscopic objects the uncertainty is extremely large

B

Azimuthal Quantum number explains about spatial orientation of orbital

C

Photon has momentum as well as wavelength, but electrons do not have momentum and wavelength

D

In photoelectric effect if frequency $\mathrm{v}>v_o$, then photoelectrons are ejected with certain kinetic energy

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is always true about a spontaneous cell reaction in a galvanic cell?

A

$E_{\text {cell }}^o> 0 ; \Delta G^o<0 ; Q_C< K_C$

B

$E_{\text {cell }}^o=0 ; \Delta G^o<0 ; Q_C=K_C$

C

$E_{\text {cell }}^o< 0 ; \Delta G^o>0 ; Q_C< K_C$

D

$ E_{\text {cell }}^o>0 ; \Delta G^o<0 ; Q_C>K_C$