NEET Hydrocarbons — Set 6

Question 1

Which of the following groups is moderately deactivating but ortho-para directing on a benzene ring?

Accepted Answer

Halogens like $ -\ce{Cl} $ are moderately deactivating due to their -I effect but direct electrophiles to ortho and para positions due to resonance.

Question 2

Which hydrocarbon is a starting material for the synthesis of aspirin?

Accepted Answer

Benzene ($ \ce{C6H6} $) is used as a starting material in the synthesis of aspirin via intermediates like salicylic acid.

Question 3

A hydrocarbon with molecular formula $ \ce{C7H16} $ has three methyl branches. What is its IUPAC name?

Accepted Answer

For $ \ce{C7H16} $ with three methyl branches, the longest chain is 4 carbons (butane), with methyl groups on carbons 2, 2, and 3, named 2,2,3-trimethylbutane.

NEET Chemistry: Hydrocarbons — Practice Set 6

Q1. Which of the following groups is moderately deactivating but ortho-para directing on a benzene ring?

Q2. Which hydrocarbon is a starting material for the synthesis of aspirin?

Q3. A hydrocarbon with molecular formula \( \ce{C7H16} \) has three methyl branches. What is its IUPAC name?

Q4. What is the effect of branching on the boiling point of alkanes?

Q5. Which hydrocarbon with molecular formula \( \ce{C4H6} \) contains a triple bond?

Q6. Which hydrocarbon is the simplest aromatic compound?

Q7. What is the \( \ce{C-C} \) bond length in alkanes?

Q8. How many hydrogen atoms are bonded to the carbon atom in \( \ce{CH3CH2CH(CH3)2} \) that bears two methyl groups?

Q9. How many isomers are possible for \( \ce{C6H14} \)?

Q10. What is the IUPAC name of \( \ce{CH3CH2CH(CH2CH3)CH3} \)?