MHT CET PYQs for Organic Chemistry - Some Basic Principles and Techniques with Solutions: Practice MHT CET Previous Year Questions

1.

Which of the following represents the Gattermann-Koch reaction?

• \( \text{Introduction of a formyl group (-CHO) to an aromatic compound using CO and HCl in the presence of AlCl}_3 \text{ or CuCl.} \)
  
• \( \text{Reduction of a nitro group to an amine group.} \)
  
• \( \text{Introduction of an acyl group (-COCH}_3) \text{ to an aromatic ring.} \)
  
• \( \text{Halogenation of an aromatic compound in the presence of a Lewis acid.} \)

2.

Which of the following alkanes is tertiary?

• \( \text{2-Methylpropane} \)
  
• \( \text{2,2-Dimethylpropane} \)
  
• \( \text{2-Methylbutane} \)
  
• \( \text{n-Butane} \)
  

3.

Write the IUPAC name for 

 

• \(2,3-dimethylheptane\)
  
• \(2,3-dimethylether\)
  
• \(2,1-dimethylalakane\)
  
• \( 2,5-dimethylpentanol\)
  

4.

The reagent used in Hofmann elimination reaction is

• Moist Ag₂O

• LiAlH₄

• Na-Hg/H₂O

• HNO₂

5.

Which of the following compounds will give a positive iodoform test?

• Methanol
  
• Ethanol
  
• Propan-1-ol
  
• Propan-2-ol
  

6.

An example of a sigma-bonded organometallic compound is:

• \( \text{Cobaltocene} \)
  
• \( \text{Ruthenocene} \)
  
• \( \text{Ferrocene} \)
  
• \( \text{Grignard's reagent} \)

7.

From the options given below, which one of the following is a primary amine?

• \( \text{Ethylamine} \, (\text{CH}_3\text{CH}_2\text{NH}_2) \)
  
• \( \text{Diethylamine} \, (\text{CH}_3\text{CH}_2\text{NHCH}_2\text{CH}_3) \)
  
• \( \text{Triethylamine} \, (\text{N(CH}_2\text{CH}_3)_3) \)
  
• \( \text{Aniline} \, (\text{C}_6\text{H}_5\text{NH}_2) \)
  

8.

Which of the following is the correct IUPAC name for $ \text{CH}_3\text{CH}_2\text{OH} $?

• Ethanol
• Methanol
• Propanol
• Butanol

9.

Identify the compound that undergoes SN1 mechanism most fastly

10.

Which of the following is the correct order of increasing acidity for the following compounds? $ \text{CH}_3\text{OH} $, $ \text{CH}_3\text{COOH} $, $ \text{HCl} $, and $ \text{H}_2\text{SO}_4 $.

• \( \text{CH}_3\text{OH}<\text{CH}_3\text{COOH}<\text{HCl}<\text{H}_2\text{SO}_4 \)
• \( \text{CH}_3\text{OH}<\text{HCl}<\text{CH}_3\text{COOH}<\text{H}_2\text{SO}_4 \)
• \( \text{HCl}<\text{CH}_3\text{OH}<\text{CH}_3\text{COOH}<\text{H}_2\text{SO}_4 \)
• \( \text{H}_2\text{SO}_4<\text{CH}_3\text{COOH}<\text{HCl}<\text{CH}_3\text{OH} \)

11.

What is the empirical formula of glucose, whose molecular formula is $ \text{C}_6\text{H}_{12}\text{O}_6 $?

• \( \text{CH}_2\text{O} \)
• \( \text{C}_2\text{H}_4\text{O}_2 \)
• \( \text{C}_3\text{H}_6\text{O}_3 \)
• \( \text{C}_6\text{H}_6\text{O}_3 \)

12.

Which of the following has the lowest boiling point?

• He
  
• Ne
  
• O
  
• F

13.

What is the empirical formula of $ \text{C}_6\text{H}_6 $?

• \( \text{CH} \)
• \( \text{C}_2\text{H}_3 \)
• \( \text{C}_3\text{H}_3 \)
• \( \text{C}_6\text{H}_6 \)

14.

Identify the functional group that has electron donating inductive effect

• $\ce{ - COOH}$
• $\ce{-CN}$
• $\ce{-CH_3}$
• $\ce{-NO_2}$

15.

Which of the following is the Reimer-Tiemann reaction?

• \( \text{Formylation of phenols using chloroform and alkali to form ortho-hydroxybenzaldehyde.} \)
  
• \( \text{Bromination of phenols in the presence of bromine water.} \)
  
• \( \text{Oxidation of phenols to quinones using an oxidizing agent.} \)
  
• \( \text{Nitration of phenols in the presence of concentrated nitric acid.} \)