Class XII Chemistry Organic Compounds Containing Oxygen 4

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Question 1

What is the function of BaSO₄ in Rosenmund reactionn–

• ATo stop further oxidation of aldehyde completely
• BIt acts as a catalyst
• CActs as a reducing agent
• DIt inhibits the reactivity of Pd to stop further reduction

Question 2

CH₃–CH₂–CHO Product. The product in the above reaction is–

• ACH_3­–CH₂COOH
• BCH₃–CH₂–CH₂OH
• C
• D

Question 3

C₃H₈O C₃H₆O
CHI₃,
In this reaction the first compound is –

• ACH₃CH₂CH₂OH
• B
• CCH₃OCH₂CH₃
• DCH₃CH₂CHO

Question 4

Which of the following statements is wrong –

• AAll methyl ketones give a positive iodoform test.
• BAcetaldehyde is the only aldehyde that gives iodoform test.
• CAll secondary alcohols give positive iodoform test.
• DAny alcohol that can be oxidised to an acetyl group gives a positive iodoform test.

Question 5

A B; ‘B’ is –

• A
• B
• C
• D

Question 6

Compound (A) C₇H₁₀, on ozonolysis gives only one compound (B)

the structure (A) is :

• A
• B
• C
• D

Question 7

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

• Atwo ethylenic double bonds
• Ba vinyl group
• Can isopropyl group
• Dan actylenic triple bond

Question 8

Bakelite is obtained from phenol by reacting with

• ACH₃COCH₃
• BHCHO
• C(CH₂OH)₂
• DCH₃CHO

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