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Tutor profile: Drbharathk K.

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Drbharathk K.
Tutor for 8 years for competitive exams like IIT mains and advance
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Questions

Subject: Organic Chemistry

TutorMe
Question:

If a pyrrole reacts with Chloroform in the presence of aq. KOH, how many products are formed and what is the name of minor product.

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Drbharathk K.
Answer:

Pyrrole + CHCl3 + KOH gives 3-formyl pyrrole + 3-chloro pyridine. The minor product in these two is 3-chloro pyridine. The name of the reaction is Riemer-Tiemann formylation reaction.

Subject: Inorganic Chemistry

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Question:

A graduate student who is working with a particular metal without wearing gloves observed that his gold ring's colour got tarnished after coming into contact with that metal. How many neutrons are present in that metal.

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Drbharathk K.
Answer:

Mercury when comes into contact with gold, for Au-Hg amalgam due to which the colour of the gold tarnished. Atomic number of Mercury is 80 and mass number is 200.59. Therefore, the number of neutrons, n = A-Z; 201-80 = 121.

Subject: Basic Chemistry

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Question:

A nail was plucked out of the wooden bridge near a river. Which portion of the nail was corroded, the exposed or the unexposed portion of the nail?

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Drbharathk K.
Answer:

The portion which is unexposed is corroded due to continuous contact with the moisture absorbed by the wood and this portion acts as anode whereas the one which is exposed outside acts as cathode and leads to the corrosion process.

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