Identify and draw the main products formed in the following chemical reactions:
Show Hint
Solution and Explanation
(a) The reaction of a primary alcohol:
The reaction results in the formation of a primary alcohol:
Product: \( \text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{OH} \)
(b) The ketone reacts with aluminium, which acts as a reducing agent, resulting in the formation of a saturated hydrocarbon:
The ketone is reduced to a saturated hydrocarbon:
Product: \( \text{CH}_3\text{CH}_2\text{CH}\text{CH}_3 \) (Isobutane is obtained after complete reduction)
Top Questions on Organic Chemistry
An aromatic compound ‘A’ with molecular formula C8H8O gives positive 2,4-DNP test. It gives yellow precipitate of compound ‘B’ on treatment with sodium hypoiodite. Compound ‘A’ does not react with Tollen’s or Fehling’s reagent; on drastic oxidation with KMnO4 it forms a carboxylic acid ‘C’. Elucidate the structures of A, B, and C. Also give their IUPAC names.
- CBSE CLASS XII - 2025
- Chemistry
- Organic Chemistry
- A compound ‘A’ with molecular formula C4H8O gives positive 2,4-DNP test. It gives yellow precipitate of compound ‘B’ on treatment with sodium hydrogen sulphite. Compound ‘A’ does not react with Tollen’s or Fehling’s reagent; on oxidation with KMnO4, it forms carboxylic acid ‘C’. Elucidate the structures of ‘A’, ‘B’ and ‘C’. Also give their IUPAC names.
- CBSE CLASS XII - 2025
- Chemistry
- Organic Chemistry
- Hofmann Bromamide degradation reaction is given by:
- CBSE CLASS XII - 2025
- Chemistry
- Organic Chemistry
- Give the IUPAC name of t-butyl methyl ether.
- CBSE CLASS XII - 2025
- Chemistry
- Organic Chemistry
- Complete the following reactions by writing the structural formulae of ‘A’ and ‘B’:
(i) \( \text{CH}_3\text{CH} = \text{CH}_2 \)
\( \xrightarrow{\text{HBr, Peroxide}} \) ‘A’ \( \xrightarrow{\text{aq. KOH}} \) ‘B’(ii) \( \text{CH}_3\text{CH}_2\text{CH(Cl)CH}_3 \)
\( \xrightarrow{\text{alc. KOH}, \Delta} \) ‘A’ \( \xrightarrow{\text{HBr}} \) ‘B’(iii) ‘A’ \( \xrightarrow{\text{Mg}} \) \( \text{CH}_3\text{CH}_2\text{CH}_2\text{MgCl} \) \( \xrightarrow{\text{H}_2\text{O, H}^+} \) ‘B’ (Main product)
- CBSE CLASS XII - 2025
- Chemistry
- Organic Chemistry
Questions Asked in CBSE CLASS XII exam
- Let \[ A = \begin{pmatrix} 1 & 4 \\ -2 & 1 \end{pmatrix} \quad \text{and} \quad C = \begin{pmatrix} 3 & 4 & 2 \\ 12 & 16 & 8 \\ -6 & -8 & -4 \end{pmatrix}. \] Then, find the matrix $B$ if $AB = C$.
Based upon the results of regular medical check-ups in a hospital, it was found that out of 1000 people, 700 were very healthy, 200 maintained average health and 100 had a poor health record.
Let \( A_1 \): People with good health,
\( A_2 \): People with average health,
and \( A_3 \): People with poor health.
During a pandemic, the data expressed that the chances of people contracting the disease from category \( A_1, A_2 \) and \( A_3 \) are 25%, 35% and 50%, respectively.
Based upon the above information, answer the following questions:
(i) A person was tested randomly. What is the probability that he/she has contracted the disease?}
(ii) Given that the person has not contracted the disease, what is the probability that the person is from category \( A_2 \)?- CBSE CLASS XII - 2025
- Probability
- If \( f(x) = \begin{cases} \frac{\sin^2 ax}{x^2}, & \text{if } x \neq 0 \\ 1, & \text{if } x = 0 \end{cases} \) is continuous at \( x = 0 \), then the value of 'a' is :
- CBSE CLASS XII - 2025
- Limit and Continuity
- Evaluate \( \int_0^{\frac{\pi}{2}} \frac{x}{\cos x + \sin x} \, dx \)
- CBSE CLASS XII - 2025
- Integration
- Solve the differential equation \( (x - \sin y) \, dy + (\tan y) \, dx = 0 \), given \( y(0) = 0 \).
- CBSE CLASS XII - 2025
- Differential Equations