Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:
- Statement I is false but Statement II is true
- Both Statement I and Statement II are true
- Statement I is true but Statement II is false
- Both Statement I and Statement II are false
Answer
(2) Both Statement I and Statement II are true
Solution
Statement I: methylcyclopentane has molecular formula C6H12; hex-3-ene CH3CH2CH=CHCH2CH3 is also C6H12.
Same molecular formula, different structures (ring vs open chain with C=C) they are isomers (ring–chain isomers). Statement I is true.
Statement II: pentan-1-amine CH3(CH2)4NH2 and N-ethylpropan-1-amine CH3CH2-NH-CH2CH2CH3 both have formula C5H13N.
The first contains a primary amino group (-NH2) and the second a secondary amino group (>NH); 1°, 2° and 3° amines of the same formula are treated as functional isomers. Statement II is true.
Answer: (2)