Acids and Bases

H2SO4 is the chemical formula for sulphuric acid, a strong mineral acid. Hydrochloric acid is HCl, nitric acid is HNO3, and benzoic acid is C7H6O2.

This option is correct because when the resorcinol are nitrated to give the 2,4,6 trinitroresorcinol, it is called as the styphinic acid that contains two OH group.

Household vinegar is essentially a solution of acetic acid in water, typically containing 4-8% acetic acid by volume. Citric acid is found in citrus fruits, tartaric acid occurs naturally in grapes and tamarind, while hydrochloric acid is a strong mineral acid used in laboratories and industry - none of these are the primary component of vinegar. Acetic acid gives vinegar its characteristic sour taste and smell.

All acids contain hydrogen ions (H+). When acids dissolve in water, they release H+ ions, which is why hydrogen is the defining element present in all acidic compounds. Oxygen is not present in all acids (e.g., HCl).

Vinegar is the commercial name for dilute acetic acid solution, typically containing 5-8% acetic acid (CH3COOH) in water. Acetic acid gives vinegar its characteristic sour taste and pungent odor. Oxalic acid and hydrochloric acid are different chemicals with different properties and uses.

The acidity of haloacetic acids increases with the number of electron-withdrawing halogen atoms. More chlorines stabilize the conjugate base better by dispersing the negative charge through inductive effect. Trichloroacetic acid (Cl3CCOOH) is strongest because it has three -I effect groups, followed by dichloro, then chloro, then unsubstituted acetic acid.

Oxalic acid is a colourless crystalline solid that dissolves in water to give colourless solutions. Its RQ value is 4.

This option is correct because the basicity of phosphorous acid (H₃PO₃) is two and sulphur acts as cross linking agent in the vulcanisation of rubber.

Lemons contain citric acid (C6H8O7), which gives them their characteristic sour taste. Citric acid is a natural preservative found in citrus fruits. Oxalic acid is in spinach (causes metallic taste), acetic acid is in vinegar. Citric acid is the correct answer.

Ni(0), Cu(I), Hg(II) and Pt(II) all are soft acids.

Heroin (diacetylmorphine) is synthesized from morphine by acetylation with acetic anhydride, resulting in two acetyl groups attached to the morphine structure. The chemical name diacetyl morphine accurately describes this modification.

The carboxylic acid functional group is -COOH, consisting of a carbonyl group (C=O) and a hydroxyl group (-OH) bonded to the same carbon atom. Option A (-COO) represents a carboxylate ion, option C (-OH) is just a hydroxyl group, and option D is incorrect since option B is valid.

Lemons contain citric acid, which gives them their characteristic sour taste. Citric acid is a weak organic acid found naturally in citrus fruits like lemons, limes, oranges, and grapefruits. Carbonic acid is in carbonated drinks, tartaric acid is in grapes/tamarind, and oxalic acid is in spinach/rhubarb.

Caro's acid (peroxymonosulfuric acid) has the formula H2SO5, containing a peroxide linkage (-O-O-). It is a powerful oxidizing agent used in organic synthesis and industrial processes.

Marshall's acid (peroxodisulfuric acid) has the formula H2S2O8. It contains two sulfur atoms each in +6 oxidation state, linked by a peroxide bridge. It is a strong oxidizing agent.