NEET Hydrocarbons — Set 20

Question 1

Which substituent on a benzene ring deactivates it and directs to the meta position?

Accepted Answer

The $ -\ce{CHO} $ (aldehyde) group withdraws electrons, deactivating the ring and directing electrophiles to the meta position.

Question 2

What is the IUPAC name of $ \ce{CH3CH2CH2CH2CH(CH3)2} $?

Accepted Answer

The longest chain has 6 carbons (hexane), with two methyl groups on the fifth carbon, making it 2,2-dimethylhexane.

Question 3

Which of the following hydrocarbons is saturated?

Accepted Answer

Saturated hydrocarbons contain only single bonds. Among the options, $ \ce{CH3CH2CH3} $ (propane) is an alkane with only single bonds, making it saturated.

NEET Chemistry: Hydrocarbons — Practice Set 20

Q1. Which substituent on a benzene ring deactivates it and directs to the meta position?

Q2. What is the IUPAC name of \( \ce{CH3CH2CH2CH2CH(CH3)2} \)?

Q3. Which of the following hydrocarbons is saturated?

Q4. Which hydrocarbon with 9 carbon atoms has the maximum possible branching and the lowest boiling point among its isomers?

Q5. Which hydrocarbon is the main component of CNG?

Q6. Which of the following hydrocarbons is obtained from coal tar?

Q7. Which of the following is a characteristic of aromatic hydrocarbons?

Q8. Which gas is commonly found in coal mines?

Q9. Which of the following hydrocarbons burns with a sooty flame?

Q10. Which substituent on a benzene ring increases reactivity towards electrophilic substitution the most?