Free Fundamental Principles of Organic Chemistry MCQs with Answers
536 Fundamental Principles of Organic Chemistry MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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Read the Fundamental Principles of Organic Chemistry notesFree MDCAT chapter notes with key terms536 questions · page 22 of 27
- A. They have low boiling points
- B. They are more soluble in non-polar solvent
- C. They show polymorphism and isomorphism
- D. They are flammable
Explanation: Organic compounds do not show the property of polymorphism and isomorphism. The show the property of isomerism.
Correct answer: They show polymorphism and isomorphism- A. CnH2n
- B. CnH2n-2
- C. CnH2n+2
- D. C2H20-4
Explanation: CnH2n+2 is valid only in case of saturated open chain hydrocarbons
Correct answer: CnH2n+2- A. Number of carbon atom
- B. Number of hydroxyl group
- C. Position of hydroxyl group
- D. All of these
Explanation: Glycol has 2 hydroxyl groups attached to two different carbon atoma while glycerol has 3 hydroxyl groups attached to 3 different carbons.
Correct answer: All of these- A. 3-Ethyl 2-methyl hexane
- B. Iso propyl hexane
- C. 4-Ethyl 5-methyl hexane
- D. 3-Ethyl,2,3-Dimethylhexane
Explanation: If we start counting from immediate right end of the chain then, there are two methyl groups on carbon 2 and 3, also a ethyl group on…
Correct answer: 3-Ethyl,2,3-Dimethylhexane- A. They have low boiling points.
- B. They are more soluble in non-polar solvent.
- C. They show polymorphism and isomorphism.
- D. They are inflammable.
Explanation: While polymorphism and isomorphism are less common in organic compounds compared to inorganic compounds, it's challenging to make a…
Correct answer: They show polymorphism and isomorphism.- A. R3C+
- B. CH+3
- C. R2CH+
- D. RCH2+
Explanation: Alkyl groups are electron donating groups. They increase the stability of carbocation.
Correct answer: CH+3- A. High boiling points
- B. High melting points
- C. Low melting points
- D. Low vapour pressure
Explanation: Yes, that statement is correct. Organic compounds that exhibit weak attractive forces, such as London dispersion forces (Van der Waals…
Correct answer: Low melting points- A. (Cn H2n+2) O
- B. (Cn + H2n+1) CO
- C. C2 H2n+1 CHO
- D. (Cn H2n+1 COOCn H2n+1)
Explanation: The correct option is A aas the general formula for Ether is (Cn H2n+2) O .
Correct answer: (Cn H2n+2) O- A. Decrease boiling point
- B. Prevent heating
- C. Prevent freezing ors fuel
- D. Prevent knocking
Explanation: The octane number of a poor fuel can also be improved by blending it with a small amount of additive like tetraethyl lead (TEL).
Correct answer: Prevent knocking- A. Pyridine
- B. Pyrrole
- C. Phenol
- D. Piperidine
Explanation: Pyridine is heterocyclic compound in which contain N in carbon ring.
Correct answer: Piperidine- A. Sp
- B. Sp³
- C. Sp²
- D. dsp
Explanation: The orbitals that undergo sp hybridization have a linear shape with a bond angle of 180
Correct answer: Sp- A. CH3CH2OH
- B. CH3OCH3
- C. CH3COOH
- D. CH3CH2Br
Explanation: The compound a is an alcohol due to the presence of OH functional group.
Correct answer: CH3CH2OH- A. Sp³
- B. Sp²
- C. Sp
- D. dsp³
Explanation: The hybridization of carbon atoms in ethane is SP3. This is because each carbon atom in ethane forms four covalent bonds, which require…
Correct answer: Sp³- A. Two hydrogen atom
- B. Three hydrogen atom
- C. One hydrogen atom
- D. No hydrogen atom
Explanation: In t butyl alcohol the central carbon atom is attached directly to three C atom hence it is not in contact with any H atom thus this…
Correct answer: No hydrogen atom- A. Option A: 1-butene is a linear hydrocarbon.
- B. Option B: Cyclohexene is an alicyclic hydrocarbon.
- C. Option C: Toluene is an aromatic hydrocarbon.
- D. Option D: Phenol is a heterocyclic compound.
Explanation: The correct answer is Option D: Phenol is not a heterocyclic compound. A heterocyclic compound contains a ring structure with different…
Correct answer: Option D: Phenol is a heterocyclic compound.- A. Aromatic compounds
- B. Branched-chain compound
- C. Alicyclic compounds
- D. None of these
Explanation: Alicyclic compounds are 3 or more atoms of carbon are linked together in a ring.
Correct answer: Branched-chain compound- A. One of the best-known gardens is the Generalife - a word which comes from the Arabic, Jannat al'-arif, "the inspector's paradise".
- B. One of the best-known gardens are the Generalife - a word which comes from the Arabic, Jannat al'-arif, "the inspector's paradise".
- C. One of the best-known gardens is the Generalife - a word which come from the Arabic, Jannat al'-arif, "the inspector's paradise".
- D. One of the best-known garden is the Generalife - a word whose comes from the Arabic, Jannat al-arif, "she inspector's paradise".
Explanation: One of the best-known gardens is the Generalife - a word which comes from the Arabic, Jannat al-'arif, "the inspector's paradise." This…
Correct answer: One of the best-known gardens is the Generalife - a word which comes from the Arabic, Jannat al'-arif, "the inspector's paradise".438. EDTA is a _ ligand
- A. Monodentate
- B. Bidentate
- C. Polydentate
- D. Tridentate
- E. None of the above
Explanation: The explanation for this question will be added soon.
Correct answer: Polydentate- A. Rancidification value
- B. Saponification value
- C. Acid Value
- D. Iodine Value
Explanation: The explanation for this question will be added soon.
Correct answer: Rancidification value- A. Alicyclic and Aromatic
- B. Open chain and branched chain
- C. Aromatic and non-aromatic
- D. Antiaromatic and antialicyclic
Explanation: They are divided into alicylic and aromatic.
Correct answer: Alicyclic and Aromatic