Hydrocarbons-Preparation, Properties and Reactions [BITSAT (Birla Institute of Technology & Science Admission Test) Chemistry]: Questions 6 - 10 of 26
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Question 6
Question MCQ▾
Above reaction is known as –
Choices
Choice (4) | Response | |
---|---|---|
a. | Carboxylation | |
b. | Oxo reaction | |
c. | Both a. and b. are correct | |
d. | None of the above |
Question 7
Question MCQ▾
Most probable mechanism for this reaction is -
Choices
Choice (4) | Response | |
---|---|---|
a. | El | |
b. | E1CB | |
c. | E2 | |
d. | α – elimination |
Question 8
Question Assertion-Reason▾
Assertion(Ꭺ)
Addition of bromine to trans-2-butene yields meso-2,3-dibromobutane.
Reason(Ꭱ)
Bromine addition to an alkene is electrophilic addition.
Choices
Choice (4) | Response | |
---|---|---|
a. | Ꭺ is true but Ꭱ is false | |
b. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ | |
c. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ | |
d. | Both Ꭺ and Ꭱ are false |
Question 9
Question MCQ▾
The compound which reacts with HBr obeying Markownikov՚s rule is?
Choices
Choice (4) | Response | |
---|---|---|
a. | CH2 = CH2 | |
b. | ||
c. | ||
d. |
Passage
Markownikoff s rule states, “the negative part of addendum is added on the carbon atom carrying lesser number of hydrogen atoms” .
However, addition, of HBr on propylene in the presence of sunlight, air or an organic peroxide produces mainly n-propyl bromide instead of isopropyl bromide. In the presence of organic peroxides, addition of HBr takes place by a free radical mechanism as follows.
Question 10 (1 of 3 Based on Passage)
Question MCQ▾
Addition of HCl on
Forms the following major product:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |