1
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

When 0.1 mole of $$\mathrm{MnO}_4{ }^{2-}$$ is oxidised, the quantity of electricity required to completely oxidise $$\mathrm{MnO}_4{ }^{2-}$$ to $$\mathrm{MnO}_4^{-}$$ is

A
96500 C
B
48250 C
C
9650 C
D
2 $$\times$$ 96500 C
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Choose the incorrect statement from the following.

A
Carbon tetrachloride is used as a preservative for anatomical specimens
B
Freon-12 acts as a propellant in aerosol sprays
C
Dichloromethane is used as a solvent in drug industry
D
DDT is useful to protect crops and to kill mosquitoes that spread malaria
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The correct sequence of filling of electrons in $$n=6$$ is:

A
$$ n s \rightarrow(n-1) d \rightarrow(n-2) f \rightarrow n p $$
B
$$ n s \rightarrow n p \rightarrow(n-1) d \rightarrow(n-2) f $$
C
$$ n s \rightarrow(n-2) f \rightarrow n p \rightarrow(n-1) d $$
D
$$ n s \rightarrow(n-2) f \rightarrow(n-1) d \rightarrow n p $$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The metallic ions that have almost same spin only magnetic moment are :

(i) $$\mathrm{Co}^{2+}$$

(ii) $$\mathrm{Mn}^{2+}$$

(iii) $$\mathrm{Cr}^{2+}$$

(iv) $$\mathrm{Cr}^{3+}$$

A
$$ \text { (iii) and (iv) } $$
B
$$ \text { (i) and (ii) } $$
C
$$ \text { (i) and (iv) } $$
D
$$ \text { (i) and (iii) } $$
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