Step 1: Understanding the Reaction.
In the given reaction, the nitration of aniline occurs with a mixture of and , resulting in the formation of p-nitroaniline as the major product due to the activating effect of the amino group in the para position. Step 2: Conclusion.
The correct answer is (C), p-nitroaniline.
02
PYQ 2017
medium
chemistryID: viteee-2
What is X in the following reaction?
1
A
2
B
3
C
4
D
Official Solution
Correct Option: (4)
Step 1: Analyze the reaction sequence.
In this reaction, undergoes a bromination and subsequent hydrogenation. The final product, X, is likely to be a methylated benzene. Step 2: Conclusion.
Thus, the product is . Final Answer:
03
PYQ 2017
medium
chemistryID: viteee-2
The cyclobutyl methylene with nitrous acid gives
1
A
2
B
3
C
4
D
Official Solution
Correct Option: (4)
Step 1: Understand the reaction mechanism.
Cyclobutyl methylene reacts with nitrous acid to form a variety of products due to the nature of the reaction, resulting in CH2, OH, and CH3 groups as possible products. Step 2: Conclusion.
Thus, the reaction with nitrous acid can yield all of the mentioned products. Final Answer:
04
PYQ 2017
medium
chemistryID: viteee-2
What is D in the following sequence of reactions?
1
A
2
B
3
C
4
D
Official Solution
Correct Option: (1)
Step 1: Analyze the reaction sequence.
The reaction sequence involves reduction of aldehyde to alcohol with sodium borohydride, followed by oxidation with PCC to form the aldehyde. Step 2: Conclusion.
Thus, the compound D is CHO. Final Answer:
05
PYQ 2017
medium
chemistryID: viteee-2
In the following reaction sequence, the correct structures of F, F, and G are
1
A
2
B
3
C
4
D
Official Solution
Correct Option: (3)
Step 1: Analyze the reaction steps.
The reaction proceeds by oxidation and the resulting products are hydroxyl groups, finally forming a methylated product. Step 2: Conclusion.
Thus, the correct structures of F, F, and G are Ph - OH, F - OH, and G - CH . Final Answer:
06
PYQ 2018
medium
chemistryID: viteee-2
In the reaction:
1
2
3
4
Official Solution
Correct Option: (1)
Step 1: This reaction involves nitrogen dioxide and ammonia as reactants. The product formed is silicon carbide, .
Final Answer:
07
PYQ 2018
medium
chemistryID: viteee-2
Which of the following is best method for reducing 3-bromopropanal to 1-bromopropane?
1
Wolf-Kishner reduction
2
Clemmenson reduction
3
Either (a) or (b)
4
Stephen's reduction
Official Solution
Correct Option: (3)
Step 1: The Wolf-Kishner and Clemmenson reductions are both suitable methods for reducing aldehydes and ketones to alkanes. Step 2: Both of these methods could be used to reduce 3-bromopropanal to 1-bromopropane.
Final Answer:
08
PYQ 2018
medium
chemistryID: viteee-2
The major product of the following reaction is:
1
a hemiacetal
2
an acetal
3
an ether
4
an ester
Official Solution
Correct Option: (2)
Step 1: In the presence of anhydrous , alcohols undergo acetal formation with aldehydes or ketones. Step 2: The major product formed is an acetal when the alcohol reacts with the carbonyl compound.
Final Answer:
09
PYQ 2024
medium
chemistryID: viteee-2
100 mL of 0.04 N HCl aqueous solution is mixed with 100 mL of 0.02 N NaOH solution. The pH of the resulting solution is:
1
1.0
2
1.7
3
2.0
4
2.3
Official Solution
Correct Option: (3)
Step 1: Understanding the Problem We are mixing 100 mL of 0.04 N HCl with 100 mL of 0.02 N NaOH. We need to find the pH of the resulting solution. Step 2: Calculating the Moles of H and OH Moles of H from HCl: Moles of OH from NaOH: Step 3: Determining the Remaining Moles of H The reaction between H and OH is: Moles of H remaining after the reaction: Step 4: Calculating the Concentration of H Total volume of the resulting solution: Concentration of H : Step 5: Calculating the pH The pH is given by: Substituting the concentration of H : Step 6: Matching with the Options The calculated pH is 2.0, which corresponds to option (C). Final Answer: The pH of the resulting solution is (C) 2.0.
