Identify the group that exerts electron withdrawing resonance effect.
- A-OR
- ✓-COOH
- C-OH
- D-NHR
Answer: B.
View full solution →Question types
Basic Principles of Organic Chemistry question types
187 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.
187
Questions
6
Question groups
5
Question types
01
MCQ
47 Q→02Answer the following questions:
27 Q→03Answer the following in one or two sentences.
23 Q→04Answer the following in brief.
35 Q→05Answer the following questions.
36 Q→06Answer the following questions in detail.
19 Q→Sample Questions
Basic Principles of Organic Chemistry questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which of the following statements is NOT correct?
- ✓Chlorine is said to exert +1 effect in the carbon chain.
- BResonance structures are represented by drawing → arrow between them.
- CCarbocations, carbanions and free radicals are reaction intermediates.
- DHomolytic cleavage of C-C bond gives free radicals.
Answer: A.
View full solution →Identify non-benzenoid aromatic compound from the following.
- APhenol
- BNaphthalene
- CBenzene
- ✓Tropone
Answer: D.
View full solution →Identify the compound that does not correctly match with its common name.
- A
- B$\mathrm{C}_6 \mathrm{H}_5-\mathrm{NH}_2 \quad:$ Aniline
- ✓
- D$\mathrm{H}-\mathrm{CHO} \quad$ : Formaldehyde
Answer: C.
View full solution →Identify ether from the following compounds.
- ABenzene-1,2-diol
- BPropan-2-ol
- CBenzenol
- ✓Methoxymethane
Answer: D.
View full solution →What are these two Lewis structures called?
How are these two Lewis structures related to each other?
Represent the above polar covalent bond between $Q$ and R using fractional charges $\delta^{+}$and $\delta^{-}$.
View full solution →Consider two covalently bonded atoms Q and R where R is more electronegative than Q. Will these atoms share the electron pair equally between them?
Some bond fissions are described in the following table. For each of them, show the movement of electron/s using curved arrow notation. Classify them as homolysis or heterolysis and identify the intermediate species produced as carbocation, carbanion or free radical.
i. What is meant by ‘reagent’?
ii. Identify the ‘reagent’, ‘substrate’, ‘product’ and ‘byproduct’ in the following reaction.
$CH_3COCl + NH_3 \rightarrow CH_3CONH_2 + HCl$
View full solution →ii. Identify the ‘reagent’, ‘substrate’, ‘product’ and ‘byproduct’ in the following reaction.
$CH_3COCl + NH_3 \rightarrow CH_3CONH_2 + HCl$
An electronic displacement in a covalent bond is represented by following notation.
A. Identify the effect
B. Is the displacement of electrons in a covalent bond temporary or permanent.
A. Identify the effect
B. Is the displacement of electrons in a covalent bond temporary or permanent.
Draw resonance srtuctures of the following : Acetate ion
Draw resonance srtuctures of the following : Buta-1,3-diene
Draw resonance srtuctures of the following : Benzaldehyde
What is the unique property of carbon that makes organic chemistry a separate branch of chemistry?
A. Name the anion produced by this breaking of a covalent bond.
B. Indicate the type of bond breaking in this case.
C. Comment on geometry of the cation formed by such bond cleavage.
B. Indicate the type of bond breaking in this case.
C. Comment on geometry of the cation formed by such bond cleavage.
| Column ‘A’ | Column ‘B’ | ||
| i. | Inductive effect | a. | Delocalization of π electrons |
| ii. | Hyperconjugation | b. | Displacement of π electrons |
| iii. | Resonance effect | c. | Delocalization of σ electrons |
| d. | Displacement of σ electrons |
Observe the structural formulae (a) and (b).
i. Find out their molecular formulae.
ii. What is the difference between them?
iii. What is the relation between the two compounds represented by these structural formulae?
Phytane is naturally occuring alkane produced by the alga spirogyra and is a constituent of petroleum. The IUPAC name for phytane is 2, 6, 10, 14-tetramethyl hexadecane. Write zig-zag formula for phytane. How many primary, secondary, tertiary and quaternary carbons are present in this molecule.
i. Draw a bond line structure of benzene $(C_6H_6)$.
ii. How many $C – C$ and $C = C$ bonds are there in this structure?
iii. Write down the expected values of the bond lengths of the carbon-carbon bonds in benzene (Refer chapter 5).
View full solution →ii. How many $C – C$ and $C = C$ bonds are there in this structure?
iii. Write down the expected values of the bond lengths of the carbon-carbon bonds in benzene (Refer chapter 5).
Draw two Newman projection formulae and two Sawhorse formulae for the propane molecule.
Complete the table:
i. Draw the structural formula of ethane.
ii. Draw electron-dot structure of propane.
ii. Draw electron-dot structure of propane.
Find out the structures of glucose, vanillin, camphor and paracetamol using internet. Mark the carbon atoms present in them. Assign the hybridization state to each of the carbon and oxygen atom. Identify sigma $(\sigma )$ and pi $(\pi )$ bonds in these molecules.
View full solution →Explain hyperconjugation in propene.
Explain hyperconjugation in ethyl carbocation.
Explain in detail the important points of resonance theory.
Describe inductive effect in detail.
What is carbocation? Explain with the help of an example and comment on the stability of carbocation.
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