1. It is not a tribasic acid.

Option (a) is incorrect for H₃BO₃

2. Aqueous solution, instead of donating the −OH group it breaks the H−OH bond of water and accepts the −OH group from it leaving in the solution hence it is mono basic acid.

On doubling the [OCl⁻] keeping the [I⁻] and [OH⁻] constant, the rate of formation of [OI⁻] is doubled, hence the order of reaction with respect to [OCl⁻] is one.

On doubling the [I⁻] keeping the [OCl⁻] and [OH⁻] constant, the rate of formation of [OI⁻] is doubled, hence the order of reaction with respect to I−is one.

On changing the [OH⁻] to a half-value, the rate of formation of [OI⁻] is doubled. Hence, the order of reaction with respect to [OH⁻] is −1.

Hence the rate law is r = k[OCl⁻] [I⁻] [OH⁻]⁻¹ = k[OCl⁻] [I⁻]/[OH⁻]

In NH₃, the lone pair is completely available for donation, hence is most basic whereas NH₂ − NH₂ and NH₂ − OH can be considered as derivatives of NH₃. Here, H is replaced by −NH₂ forming NH₂ − NH₂ and −OH forming NH₂ − OH being highly electron withdrawing due to −O will decrease the election density most on −N.

∴ Least basic elect;on withdrawing −I-effect of

−NH₂ is less as compared to - OH.

Hence correct order of basic strength is

NH₃ > NH₂ − NH₂ > NH₂ − OH

Dettol is an antiseptic solution composed of two main active ingredients: chloroxylenol and terpeneol. These ingredients are dissolved in a suitable solvent, such as ethanol or isopropyl alcohol.

• Chloroxylenol is effective against bacteria.
• Terpeneol contributes deodorant properties.
• The solvent aids in dissolving these components to create the liquid solution used for antiseptic purposes.

In KO₂, the nature of oxygen species and the oxidation state of oxygen atom are, superoxide and −1/2 respectively.

Superoxide ion is O^-₂.

Let X be an oxidation state of oxygen. The oxidation state of K is +1.

+ 1 + 2(X) = 0

2X = - 1

X = -1/2

Fluoride - 1000 ppb = 1 ppm (which is within the permitted levels, viz. < 10 ppm)

Lead - 40 ppb (which is within the permitted levels, viz. < 50 ppb)

Iron - 0.2 ppm( is the maximum permmiscible limit)

Nitrate - 100 ppm is not suitable for drinking.

[NO₃^-] > 50 ppm, in drinking water can cause disease such as methemoglobinemia ('blue baby' syndrome).

Dipole moment of X is more than Y.

Boiling point of X is more than Y.