Chemistry · Science General

Alcohols, Ethers and Carboxylic Acids

391 Questions

Alcohols, ethers, and carboxylic acids questions explore organic chemistry reactions, chemical formulas, and compound identifications. The topics cover practical applications like antifreeze production and specific chemical conversions. This material helps candidates preparing for science oriented competitive exams.

Organic reactionsChemical compounds identificationAlcohol conversionCarboxylic acid propertiesIndustrial chemical applications

Alcohols, Ethers and Carboxylic Acids Questions

Multiple choice chemistry world energy needs coal petroleum non-renewable sources of energy

Which of the following is/are true regarding creosote oil?

  1. It contains cresols along with some naphthalene and quinoline.

  2. It is not worked up because its constituents are more easily obtained by synthetic methods.

  3. It is used as such under the name of creosote oil for the preservation of wood and for the manufacture of some disinfectants.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of the given statements are true regarding creosote oil.
It contains cresols along with some naphthalene and quinoline.
It is not worked up because its constituents are more easily obtained by synthetic methods.
It is used as such under the name of creosote oil for the preservation of wood and for the manufacture of some disinfectants.

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

The organic compound which was first prepared in the laboratory ?

  1. Acetic acid

  2. Methane

  3. Urea

  4. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Urea was first discovered in urine in 1727 by the Dutch scientist Herman Boerhaave, This was the first time an organic compound was artificially synthesized from inorganic starting materials, without the involvement of living organisms.

Multiple choice

TCA Cycle starts with the condensation of acetyl group with

  1. OAA

  2. and water

  3. To yield Citric Acid

  4. All
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Krebs cycle begins with the condensation of the 2-carbon acetyl group from Acetyl-CoA with the 4-carbon Oxaloacetic acid (OAA) in the presence of water to form Citric acid.

Multiple choice chemistry carbon and its compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

Which out of the following has smell similar to that of vinegar?

  1. Methanol

  2. Ethanol

  3. Ethanoic acid

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

Vinegar is a liquid having acetic acid and water as its mixture. So, ethanoic acid is the other name of acetic acid and this smell of vinegar is similar to ethanoic acid. 

Multiple choice chemistry carbon and its compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

Ethanol is:

  1. ionic compound

  2. noble gas

  3. polar covalent compound

  4. non-polar covalent compound
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ethanol can be written as $CH _3-CH _2-OH$. The oxygen atom in the hydroxyl ($OH$) group is highly electronegative and hence attracts the electrons towards itself. Thus, ethanol is a polar compound with its electrons more towards the oxygen atom. Although ($C _2H _5$) group is non polar.

All the bonds in ethanol are covalent in nature. The bonds are formed by sharing of electrons between the atoms.
Thus, option $C$ is the correct answer.

Multiple choice innate and learned behaviour option a: neurobiology and behaviour biology

Alcoholic beverages contain

  1. Methyl alcohol

  2. Ethyl alcohol

  3. Propyl alcohol

  4. A mixture of all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Alcoholic beverages are produced by the distillation of ethanol. 
Ethanol or ethyl alcohol is produced by fermentation of fruits, vegetables or grains. 
There are different types of alcoholic drinks based on alcohol content. Alcohol is a depressant and reduces anxiety and produces euphoria (feeling of excitement). 
Alcohol if taken regularly can cause addiction and serious health problems.
So, the correct answer is 'Ethyl alcohol'.
Multiple choice innate and learned behaviour option a: neurobiology and behaviour biology

Hangover is due to accumulation of 

  1. Ethanol in liver

  2. Ethanol in lungs

  3. Acetaldehyde in body

  4. Formation of formaldehyde from acetaldehyde
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Hangover is the experience of unpleasant effects in body (which may be physiological or psychological) after consuming alcohol. It occurs due to accumulation of acetaldehyde in the body. Acetaldehyde is formed from alcohol by the action of enzyme alcoholic dehydrogenase (ADH). It causes dizziness, dry mouth, headache weakness, mood changes etc. Dehydration also occurs as urine output is increased due to consumption of alcohol. 
So, the correct answer is 'Acetaldehyde in body'.
Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Choose the property of sulfuric acid, which is relevant to the preparations of : 
    Ethene from ethanol :

  1. Oil. acid (typical acid properties)

  2. Non-volatile acid

  3. Oxidizing agent

  4. Dehydrating agent
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sulfuric acid acts as a dehydrating agent in the preparation of ethene from ethanol (C2H5OH -> C2H4 + H2O).

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Sugar on treating with conc.${H} {2}{SO} _{4}$ produces a black mass. In this ${H} _{2}{SO} _{4}$ acts as a _________.

  1. decarboxylating agent

  2. dehydrogenating agent

  3. dehydrating agent

  4. All the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sulfuric acid is a dehydrating agent in the reaction that removes water from the sugar in a highly exothermic reaction, releasing heat, steam, and sulfur oxide fumes.

Multiple choice chemistry nitrogen and sulfur ammonia and fertilizers preparation of ammonia-laboratory method and haber's process ammonia

An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be

  1. a primary amine

  2. a secondary amine

  3. a tertiary amine

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When alkyl halide reacts with ammonia , it gives primary amine .

Reaction doesn't stop there and primary amine further gives secondary amine .
Secondary gives tertiary .
Hence mixture of three is formed .

Multiple choice

What is the name of the functional group that contains a carbon-oxygen double bond?

  1. Alcohol

  2. Aldehyde

  3. Ketone

  4. Carboxylic Acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ketones are functional groups that contain a carbon-oxygen double bond. They are characterized by the presence of the carbonyl group (C=O).

Multiple choice

What is the general formula for an alcohol?

  1. R-OH

  2. R-O-R

  3. R-C=O

  4. R-COOH
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alcohols are organic compounds that contain a hydroxyl group (-OH) attached to a carbon atom. The general formula for an alcohol is R-OH, where R is an alkyl group.

Multiple choice

What is the chemical equation for the combustion of ethanol?

  1. $$C_2H_5OH + 3O_2 \rightarrow 2CO_2 + 3H_2O$$
  2. $$C_2H_5OH + 2O_2 \rightarrow 2CO + 3H_2$$
  3. $$C_2H_5OH + 4O_2 \rightarrow 2CO_2 + 2H_2O$$
  4. $$C_2H_5OH + 5O_2 \rightarrow 2CO_2 + 3H_2O$$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The chemical equation for the combustion of ethanol is $$C_2H_5OH + 3O_2 \rightarrow 2CO_2 + 3H_2O$$. This reaction is a combustion reaction in which ethanol reacts with oxygen to form carbon dioxide and water.

Multiple choice

What is the chemical reaction that occurs during interesterification?

  1. Esterification

  2. Hydrolysis

  3. Saponification

  4. Transesterification
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Interesterification involves the transesterification reaction, where the fatty acids of one triglyceride molecule are exchanged with those of another triglyceride molecule, leading to the formation of new triglycerides with different melting points.