1
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

2
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$

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

Resistance of 0.2 M solution of an electrolyte is $50 \Omega$. The conductivity of the solution is $1.3 \mathrm{Sm}^{-1}$. If the resistance of 0.4 M solution of the same electrolyte is $260 \Omega$, its molar conductivity is:

A

$6.25 \times 10^{-3} \mathrm{Sm}^2 \mathrm{~mol}^{-1}$

B

$62.5 \times 10^{-4} \mathrm{Sm}^2 \mathrm{~mol}^{-1}$

C

$6.25 \times 10^{-4} \mathrm{Sm}^2 \mathrm{~mol}^{-1}$

D

$625 \times 10^{-4} \mathrm{Sm}^2 \mathrm{~mol}^{-1}$

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

$$ \begin{aligned} &\text { Identify products }\left[\mathbf{P}_{\mathbf{1}}\right] \text { and }\left[\mathbf{P}_{\mathbf{2}}\right] \text { formed when Benzonitrile undergoes the following reactions. }\\ &\text { Benzo nitrile } \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{SnCl}_2 / \mathrm{HCl} / \text { ether }}[\mathrm{X}] \end{aligned} $$

COMEDK 2026 Afternoon Shift Chemistry - Aldehyde and Ketone Question 2 English

A

$$ \left[\mathrm{P}_1\right] \text { Phenol and }\left[\mathrm{P}_2\right] \text { Sodium benzoate } $$

B

$$ \left[\mathrm{P}_1\right] \text { Benzoyl chloride. and }\left[\mathrm{P}_2\right] \text { Acetophenone } $$

C

$$ \left[P_1\right] \text { Acetophenone. } \quad \text { and } \quad\left[P_2\right] \text { Benzoic acid } $$

D

$$ \left[\mathrm{P}_1\right] \alpha \text {-Hydroxy phenylacetic acid and }\left[\mathrm{P}_2\right] \text { Benzyl alcohol } $$