Select the correct statements among the following for sulphuric acid.
(I) It has a high boiling point and viscosity.
(II) There are two types of bond lengths in its bivalent anion.
(III) $p π - d π$ bonding between sulphur and oxygen is observed.
(IV) Sulphur has the same hybridization that is of boron in diborane.

I I

and

I I I

only

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I I, I I I

and

I V

only

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I, I I I

and

I V

only

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I I I

and

I V

only

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Solution

The correct option is C $I, I I I$ and $I V$ only
The correct statements for sulphuric acids are -
(I) It has a high boiling point ( $338^{o} C$ ) and viscosity (sp. gr 1.8). The hydrogen bonding results in the molecular association.
(II) There are two types of bond lengths in the neutral molecule. However, in its bivalent anion, only one type of bond length is observed due to resonance.
(III) $p π - d π$ bonding between sulfur and oxygen is observed.
(IV) Sulfur has the same hybridization ( $s p^{3}$ ) that is of boron in diborane. This results in tetrahedral geometry with a bond angle of ${109.5}^{o}$ .

Therefore, the correct option is $C$

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(a) (i) and (iii)
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II.

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III. Sulphur has oxidation states of +5 and +3 in disulphurous acid.

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
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Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
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