Messages posted by ashish.alias.ashu@gmail.com

Thanks a lot!

Respected Sir, I already knew this much about the resolution of diastereomers. The only problem that I have is that out of the four given options [(a),(b),(c) and (d)], since all the given options are bases, which of them are correct which can be the answer to the given question.

And about the other options that I mentioned in the question, it means that if your answer is (a),(b) then why are other options (i.e. (c) and (d)) incorrect OR if your answer is (b),(c),(d) then why is the other left out option incorrect.

The answer given in my book is (a),(b).

Since all of them are bases, why are only (a),(b) correct?

Please reply.

Assume that a tunnel is dug across the earth (radius=R) passing through its centre. Find the time a particle takes to cover the length of the tunnel if
(a) it is projected into the tunnel with a speed of $\sqrt{gR}$
(b) it is released from a height R above the tunnel
(c) it is thrown vertically upward along the length of tunnel with a speed of $\sqrt{gR}$

Please post the full solution. Please give a detailed solution.

No need to describe the part that the time period for the tunnel dug along the diameter of the earth.

In (a) part, I'm having problems with the phase difference, i.e., I have done some part of the problem and got amplitude A=R. How to go about handling the phase difference?

MORE THAN ONE CHOICE CORRECT

A mixture of racemic can resolved by reacting with

(a)

(b)

(c)

(d)

Please give the explanation as to why the other options (besides your answer) are incorrect.

Find the number of optically active compounds in the isomers of .

Please give the structures of all the compounds, including the ones which are optically inactive. If not possible, then atleast give their names.

How many structural isomers of a hydroxy acid of formula show optical activity?

Please draw the structures involved. If not possible, atleast give their names (IUPAC).

Assume that a tunnel is dug across the earth (radius=R) passing through its centre. Find the time a particle takes to cover the length of the tunnel if
(a) it is projected into the tunnel with a speed of $\sqrt{gR}$
(b) it is released from a height R above the tunnel
(c) it is thrown vertically upward along the length of tunnel with a speed of $\sqrt{gR}$

Please post the full solution. Please give a detailed solution.

In (a) part, I'm having problems with the phase difference, i.e., I have got the amplitude as A=R.

Yes, benzyl alcohol shows Lucas Test because the carbocation (i.e. the benzyl carbocation) which is formed is stable and thus gives Lucas Test with immediate turbidity.

In Lucas Test, one has to look for the stability of the carbocation formed.

Can you please continue the answer further. I already knew this much. The only problem that I have is regarding the phase difference.

Please complete the solution.

Cyclopentane reacts with excess of ${Cl}_{2}$ at a high temp. to form dichloro cyclopentane. How many products including stereoisomers will be formed?
(a) 7(b) 6
(c) 5 (d) 3

The answer given is (a).

Also, please show the structures of the products.

It is proposed to move a particle in SHM on a rough horizontal surface by applying an external force along the line of motion. Sketch the graph of the applied force against the position of the particle. Note that the applied force has two values for a given position depending on whether the particle is moving in positive or negative direction.

Assume that a tunnel is dug across the earth (radius=R) passing through its centre. Find the time a particle takes to cover the length of the tunnel if
(a) it is projected into the tunnel with a speed of $\sqrt{gR}$
(b) it is released from a height R above the tunnel
(c) it is thrown vertically upward along the length of tunnel with a speed of $\sqrt{gR}$

Please give a detailed solution. Your replies are cordially invited.

Can simple harmonic motion take place in a non-inertial frame? If yes, should the ratio of the force applied with the displacement be constant?

I know that the answer to the first part is yes. Please give the answer to the second part of the question explaining why the ratio of the force applied with the displacement is constant or variable.

Please give a proper explanation.

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