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COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of these represents the correct order of decreasing bond order?

A
$$\mathrm{C}_2^{2-}>\mathrm{O}_2^{2+}>\mathrm{O}_2^{-}>\mathrm{He}_2^{2+}$$
B
$$\mathrm{O}_2^{-}>\mathrm{O}_2^{+}>\mathrm{He}_2^{+}>\mathrm{C}_2^{2-}$$
C
$$\mathrm{He}_2^{+}>\mathrm{O}_2^{-}>\mathrm{C}_2^{2-}>\mathrm{O}_2^{+}$$
D
$$\mathrm{He}_2^{+}>\mathrm{O}_2^{2-}>\mathrm{O}_2^{+}>\mathrm{O}_2^{-}$$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Pick up the correct statement.

A
Dipole moment of ammonia is due to orbital dipole and resultant diapole in same direction.
B
$$\mathrm{O}_2, \mathrm{H}_2$$ shown bond diapole due to polarisation.
C
Dipole moment is scalar quantity.
D
In $$\mathrm{BF}_3$$ bond dicopoles are zero but dipole moment is higher.
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Total number of $$\sigma$$ and $$\pi$$ bonds in ethene molecule is

A
$$1 \sigma$$ and $$2 \pi$$ bonds
B
$$5 \sigma$$ and $$1 \pi$$ bonds
C
$$5 \sigma$$ and $$2 \pi$$ bonds
D
$$3 \sigma$$ and $$1 \pi$$ bonds
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of these molecules have non-bonding electron pairs on the cental atom?

$$\mathrm{I}: \mathrm{SF}_4 : \mathrm{II}: \mathrm{ICl}_3 : \mathrm{III}: \mathrm{SO}_2$$

A
II only
B
I and II only
C
I and III only
D
I, II and III
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