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

Multiple choice biology food for health fats fats and their test different nutrients in food

Which of these is not a ketone body

  1. Acetoacetic acid

  2. Acetone

  3. Succinic acid

  4. Betahydroxy butyric acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In human and most other mammals, acetyl Co-A formed in the liver during oxidation of fatty acids can enter the citric acid cycle or can be converted to the "Ketone bodies" (e.g., Acetone, Acetoacetate and D - $\beta $ hydroxy butyrate) for export to other tissue.

Multiple choice chemistry chemical kinetics kinetic study of some first order reactions rate of chemical reaction endothermic and exothermic reactions

The acid hydrolysis of the ester is:
(i) first order reaction
(ii) bimolecular reaction
(iii) unimolecular reaction
(iv) second order reaction

The true statements are:

  1. i, ii

  2. All are correct

  3. ii, iv

  4. ii, iii, iv
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$CH _{3}COOC _{2}H _{5}+H _{2}O\rightarrow CH _{3}COOH+C _{2}H _{5}OH$
$ rate=K[CH _{3}COO\ C _{2}H _{5}]^{1}[H _{2}O]^{0}$
thus, it is first order & bi molecular reaction.

Thus, statement i and ii are correct.

Multiple choice chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

A salt derived from strong acid and weak base will dissolve in water to give a solution which is :

  1. acidic

  2. basic

  3. neutral

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In neutralization reaction the strong acid with weak base reaction the solution becomes acidic in nature as the salt formed in it alongwith water.

Multiple choice chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

An aqueous solution of a salt of a weak base and a strong acid is acidic, because of:

  1. electrolysis

  2. hydrolysis

  3. dissociation

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In neutralization reaction weak base reacts with strong acid to give salt of strong acidic solution and water.

${ NH } _{ 4 }OH+{ H } _{ 2 }{ SO } _{ 4 }\rightarrow \left( { NH } _{ 4 } \right) _{ 2 }{ SO } _{ 4 }+{ H } _{ 2 }O$

Multiple choice chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

Which hydrolysis results in basic solution?

  1. Neutralisation reaction

  2. Weak acid

  3. Strong acid

  4. Weak base
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Base hydrolysis results in basic solution.

A base hydrolysis reaction will resemble the reaction for base dissociation. A common weak base that dissociates in water is ammonia:

$NH _3 + H _2O \rightarrow NH^{4+} + OH^-$

In the hydrolysis of ammonia, the ammonia molecule accepts a proton from the water (because water acts as a Bronsted-Lowry acid), producing a hydroxide anion ($OH^-$). Similar to a basic dissociation reaction, ammonia forms ammonium and a hydroxide from the addition a water molecule. 

Multiple choice chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

An aqueous solution of a salt of a weak base and a strong acid is acidic because of:

  1. electrolysis

  2. hydrolysis

  3. dissociation

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A salt of strong acid and weak base undergo hydrolysis on action with water and flourishes $H^{+}$ ion due to hydrolysis of cation. Hence, an aqueous solution of a salt of a weak base and a strong acid is acidic.

Multiple choice chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

The compound whose $0.1\space M$ solution is acidic:

  1. Ammonium formate

  2. Ammonium sulphate

  3. Ammonium chloride

  4. Sodium formate
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Explanation

Concept :-

  A compound will be acidic if it form strong acidic solution after dissolving in water.
A. $HCOONH _4 + H _2 O \rightarrow \underset{Weak \, acid}{HCOOH} + \underset{weak \, base}{NH _4OH}$

B. $(NH _4) _2 SO _4 + 2H _2 O \rightarrow \rightarrow \underset{Strong \, acid}{H _2SO _4} + \underset{Weak\, base}{2NH _4OH}$

C. $NH _4 Cl + H _2O \rightarrow \underset{Weak \, base}{NH _4 OH} + \underset{Strong \, acid}{HCl}$

D. $HCO\overset{-}{O}N\overset{+}{a} + H _2O \rightarrow \underset{Strong \, base}{NaOH} + \underset{Weak \ acid}{HCOOH}$

Multiple choice economics environmental economics acid rain air pollution - effects and control air pollution and its effects

In acid rain, sulphuric acid accounts for 

  1. 100% of acid

  2. 70% of acid

  3. 50% of acid

  4. 30% of acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Acid rain is acidic with a pH of below 5.6. Rain becomes acidic because of gases that dissolve in the rain. Approximately 70% of acid rain is a result of dissolved sulfur dioxide ($SO _2$), which forms sulphuric acid. The remaining 30% or so comes from various nitrogen oxides (mostly $NO _2$ and $NO _3$, which has collectedly called NOx). There are also a small percentage of hydrochloric acid and carbonic acid.

The equation is as follows: 
Sulphuric acid when it joins with hydrogen atoms in the air: 
$SO _3$(g) + $H _2O$ (l) = $H _2SO _4$ (aq). 
In the air, the nitrogen ion becomes nitric or nitrous acid: 
$NO _2$(g) + $H _2O$(l) = $HNO _3$ (aq) + $HNO _2$(aq).

Multiple choice economics environmental economics acid rain air pollution - effects and control air pollution and its effects

The rain mixed with sulphuric acid is called as

  1. Acid rain

  2. Alkaline rain

  3. Neutral rain

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The oxides in the atmosphere can react with the water to form respective acids. Generally, the non-metal oxides such as sulphur dioxide and nitrogen oxide react with water to form sulphuric and nitric acid. These acids along with rain water fall on earth as acid rain.

Thus, the correct answer is option A.