Welcome to the Carboxylic Acids Physical Properties MDCAT MCQs with Answers. In this post, we have shared Carboxylic Acids Physical Properties Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Chemistry offers a chance to enhance your knowledge regarding Carboxylic Acids Physical Properties MCQs in this MDCAT Online Test.
Which of the following carboxylic acids has the highest boiling point?
a) Ethanoic acid
b) Propanoic acid
c) Butanoic acid
d) Methanoic acid
Carboxylic acids generally have higher boiling points than their corresponding alcohols due to:
a) Van der Waals forces
b) Hydrogen bonding
c) Dipole-dipole interactions
d) Ionic interactions
The solubility of carboxylic acids in water generally:
a) Increases with increasing molecular weight
b) Decreases with increasing molecular weight
c) Remains constant
d) Is unaffected by molecular weight
Which carboxylic acid is expected to be most soluble in water?
a) Octanoic acid
b) Hexanoic acid
c) Butanoic acid
d) Methanoic acid
Carboxylic acids typically have which type of odor?
a) Sweet
b) Fruity
c) Pungent
d) None of the above
Which carboxylic acid has a lower melting point compared to others?
a) Ethanoic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid
The presence of which functional group in carboxylic acids contributes to their high boiling points?
a) Hydroxyl group
b) Carbonyl group
c) Carboxyl group
d) Methyl group
The carboxylic acid with the smallest molecular size is:
a) Butanoic acid
b) Propanoic acid
c) Methanoic acid
d) Octanoic acid
Carboxylic acids form which type of bonds with water?
a) Hydrogen bonds
b) Ionic bonds
c) Covalent bonds
d) Metallic bonds
Which of the following is a characteristic physical property of carboxylic acids?
a) High vapor pressure
b) Low boiling points
c) Strong acidic nature
d) Neutral pH
Carboxylic acids generally show which type of intermolecular forces?
a) London dispersion forces
b) Hydrogen bonding
c) Dipole-dipole interactions
d) Ionic interactions
Which carboxylic acid is expected to have a higher solubility in water due to its lower molecular weight?
a) Decanoic acid
b) Hexanoic acid
c) Butanoic acid
d) Methanoic acid
The odor of which carboxylic acid is described as “rancid”?
a) Acetic acid
b) Propanoic acid
c) Butanoic acid
d) Methanoic acid
In which state of matter are most carboxylic acids found at room temperature?
a) Solid
b) Liquid
c) Gas
d) Plasma
The boiling point of carboxylic acids increases with:
a) Decreasing molecular weight
b) Increasing molecular weight
c) Increasing the number of double bonds
d) Decreasing the number of hydroxyl groups
Carboxylic acids exhibit which type of solubility trend in water as their chain length increases?
a) Increased solubility
b) Decreased solubility
c) No change in solubility
d) Initial decrease then increase
Which of the following carboxylic acids is a solid at room temperature?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid
The smell of which carboxylic acid is described as “vinegar-like”?
a) Acetic acid
b) Formic acid
c) Butanoic acid
d) Hexanoic acid
Which carboxylic acid has the lowest melting point?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid
Carboxylic acids generally show which trend in melting points as the length of the carbon chain increases?
a) Decrease
b) Increase
c) Remain constant
d) First increase then decrease
Which of the following carboxylic acids is most likely to be liquid at room temperature?
a) Methanoic acid
b) Butanoic acid
c) Octanoic acid
d) Decanoic acid
Carboxylic acids with which type of carbon chain are least soluble in water?
a) Short carbon chains
b) Long carbon chains
c) Branched carbon chains
d) Aromatic carbon chains
Which physical property of carboxylic acids is attributed to hydrogen bonding?
a) High vapor pressure
b) Low boiling point
c) High boiling point
d) Low solubility in water
The boiling point of which carboxylic acid is likely to be the lowest among the following?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid
Which of the following carboxylic acids is expected to be a solid at room temperature and have a high melting point?
a) Methanoic acid
b) Propanoic acid
c) Butanoic acid
d) Octanoic acid
The solubility of carboxylic acids in organic solvents generally:
a) Increases with increasing molecular weight
b) Decreases with increasing molecular weight
c) Remains constant
d) Is not dependent on molecular weight
The acidity of carboxylic acids leads to which physical property?
a) Low boiling point
b) High melting point
c) High solubility in organic solvents
d) Strong odor
Which of the following is true about carboxylic acids in terms of their water solubility?
a) They are soluble in all organic solvents
b) Their solubility decreases with increasing carbon chain length
c) Their solubility increases with increasing carbon chain length
d) They are insoluble in water
Which of the following carboxylic acids has the highest solubility in water?
a) Ethanoic acid
b) Butanoic acid
c) Octanoic acid
d) Decanoic acid
Which physical property of carboxylic acids is affected by their carboxyl group?
a) Melting point
b) Vapor pressure
c) Solubility in organic solvents
d) Color
Carboxylic acids are typically found in which physical state at room temperature?
a) Gas
b) Liquid
c) Solid
d) Plasma
The characteristic odor of carboxylic acids is often due to:
a) Their low molecular weight
b) Their high molecular weight
c) The carboxyl group
d) The hydroxyl group
Which of the following statements is true about the solubility of carboxylic acids in organic solvents?
a) Carboxylic acids are soluble in non-polar solvents
b) Carboxylic acids are insoluble in polar solvents
c) Carboxylic acids are soluble in both polar and non-polar solvents
d) Carboxylic acids are soluble in polar solvents but not in non-polar solvents
The odor of which carboxylic acid is described as “pungent”?
a) Methanoic acid
b) Acetic acid
c) Propanoic acid
d) Butanoic acid
The high boiling points of carboxylic acids can be attributed to:
a) Van der Waals forces
b) Hydrogen bonding
c) Ionic interactions
d) Dipole-dipole interactions
Which carboxylic acid is expected to be in a liquid state at room temperature?
a) Octanoic acid
b) Decanoic acid
c) Butanoic acid
d) Methanoic acid
Which factor is primarily responsible for the high solubility of short-chain carboxylic acids in water?
a) Their non-polar nature
b) Their ability to form hydrogen bonds
c) Their large size
d) Their low boiling points
Carboxylic acids with which structure tend to have lower melting points?
a) Linear
b) Branched
c) Cyclic
d) Aromatic
The odor of which of the following is most likely to be described as “rancid”?
a) Methanoic acid
b) Acetic acid
c) Butanoic acid
d) Propanoic acid
Carboxylic acids are generally more soluble in water compared to which type of compounds?
a) Aldehydes
b) Alcohols
c) Alkanes
d) Ketones
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