Chemistry
Acids and Bases
594 Questions
Acids and bases questions cover the chemical properties, common examples, and theoretical concepts of acidic and basic substances. Topics include identifying proton acceptors, recognizing amphoteric substances, and knowing the sources of everyday organic acids. These foundational chemistry questions are common across SSC, banking, and railways examinations.
Acid and base propertiesOrganic acidsAmphoteric substancesProton donors and acceptorsChemical formulas
Acids and Bases Questions
-
Diacetyl morphine
-
Triacetyl morphine
-
Tetra acetyl morphine
-
Monoacetyl morphine
-
Penta acetyl morphine
A
Correct answer
Explanation
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.
-
-COO
-
-COOH
-
-OH
-
none of these
B
Correct answer
Explanation
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.
-
Carbonic acid
-
Tartaric acid
-
Oxalic acid
-
Citric acid
D
Correct answer
Explanation
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.
-
H2SO5
-
H2S2O5
-
H2S3O5
-
H2SO4
A
Correct answer
Explanation
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.
-
H2S3O8
-
H2S2O8
-
H3S2O8
-
H2S8O3
B
Correct answer
Explanation
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.
-
acids only
-
bases only
-
neither bases nor acids
-
both bases and acids
D
Correct answer
Explanation
Amphoteric oxides are those which react with both bases and acids.
-
Only A
-
Only B
-
Only C
-
A and B
-
A and C
D
Correct answer
Explanation
Yes, both are incorrect.
Incorrect statement:
Ni(0), Cu(I), Hg(II) and Pt(II) are soft acids.
Incorrect statement:
Li(I), Ca(II), Al(III) and Si(IV) are hard acids.
-
Sodium bicarbonate
-
Sulphuric acid
-
Sodium carbonate
-
None of these
B
Correct answer
Explanation
This question asks for the chemical name of sulphuric acid (H2SO4). The correct answer is B - sulphuric acid itself, as it's asking for the name, not a different compound. Option A (sodium bicarbonate) is baking soda, and option C (sodium carbonate) is washing soda. Option D is incorrect since B is valid.
-
Alkaline
-
Acidic
-
Neutral
-
Oxidant
-
Acetyl Acetate
-
Cobalt Oxide
-
Acetylic Acid
-
Acetyl Salicyclic Acid
D
Correct answer
Explanation
Aspirin's chemical name is Acetyl Salicyclic Acid (Acetylsalicylic acid). It is a widely used pain reliever, fever reducer, and anti-inflammatory medication. Acetyl Acetate and Cobalt Oxide are different compounds, and 'Acetylic Acid' appears to be a misspelling.
-
a and b
-
b and c
-
a and d
-
a and c
-
b and d
D
Correct answer
Explanation
This is the correct option. Sulphuric acid and nitric acid dissolve in rainwater and fall to the Earth in the form of acid rain.
-
Hydrochloric acid
-
Sulphuric acid
-
Nitric acid
-
All of above
B
Correct answer
Explanation
Sulfuric acid is the electrolyte in lead-acid batteries. The chemical reaction between lead dioxide and sponge lead plates with sulfuric acid generates electrical energy. Hydrochloric and nitric acids would react differently and damage the battery.
-
PEP
-
malic acid
-
pyruvic Acid
-
oxalo acetic acid
D
Correct answer
Explanation
Weak bases do not ionise completely in an aqueous solution. Ammonium hydroxide also does not completely ionise in the medium. Hence, it is a weak base.
-
molecules only
-
ions and molecules
-
ions only
-
neither ions nor molecules
C
Correct answer
Explanation
Strong acids are those which ionis completely in the medium. Because of complete ionisation they give ions only in the medium.e.g.HCl, HNO3, H2SO4 etc.