Recent questions tagged ch12

Refer to the below reaction:

asked Dec 3, 2013 by sreemathi.v

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The product of of the following reaction can be

asked Dec 3, 2013 by sreemathi.v

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Arrange in the decresing order of reactivity with HOCl

asked Dec 3, 2013 by sreemathi.v

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Which of the following alkanes will give single product with a methylene insertion?

asked Dec 3, 2013 by sreemathi.v

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Refer to the below reaction :

asked Dec 3, 2013 by sreemathi.v

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Which order are correct regarding stability?

asked Dec 3, 2013 by sreemathi.v

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Which orders are correct regarding melting point?

asked Dec 3, 2013 by sreemathi.v

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Which will have the highest heats of hydrogenation?

asked Dec 3, 2013 by sreemathi.v

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Arrange the following alkenes in increasing order of their enthalphy of hydrogenation

asked Dec 3, 2013 by sreemathi.v

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Under conditions where carbocation rearrangements are not observed, 3 products are obtained from the addition of HBr to 1,3-pentadiene. Which of the following structures are not expected to be among the products?

asked Dec 3, 2013 by sreemathi.v

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Arrange the following alkenes in the increasing order of their heat of hydrogenation

asked Dec 3, 2013 by sreemathi.v

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Refer to the below reaction:

asked Dec 3, 2013 by sreemathi.v

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Rank the alkenes given below in terms of their relative stability starting with the most stable?

asked Dec 3, 2013 by sreemathi.v

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Examine the following reaction

asked Dec 3, 2013 by sreemathi.v

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Select the starting material for the following reaction

asked Dec 3, 2013 by sreemathi.v

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Select the best starting material for the following reaction

asked Dec 3, 2013 by sreemathi.v

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How many stereoisomers of the main product will form in the following reaction?

asked Dec 3, 2013 by sreemathi.v

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Consider the following transformation in which a cyclic bromoether is formed than the expected bromohydrin. Which of the electron pushing scheme represents the mechanism of this reaction?

asked Dec 3, 2013 by sreemathi.v

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Protonation of 1,2-butadine gives carbocation(A) and protonation of 2-butene gives carbocation(B). In both case the most stable crbocation possible is produced but no carbocation rearrangements take place. Which of the two carbocation is more stable and why?

asked Dec 3, 2013 by sreemathi.v

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There are three common ways to convert an alkene into alcohol: a) acid catalysed hydration, b)hydroboration -oxidation and c)oxymercuration-demercuration. Which of the following statements about these reactions is correct?

asked Dec 2, 2013 by sreemathi.v

1 answer

Consider the following reaction

asked Dec 2, 2013 by sreemathi.v

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1-Methyl cyclopentene can be

asked Dec 2, 2013 by sreemathi.v

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Arrange in decreasing order of reactivity with HCl

asked Dec 2, 2013 by sreemathi.v

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Refer to the below equation:

asked Dec 2, 2013 by sreemathi.v

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Which order are correct regarding the melting point?

asked Dec 2, 2013 by sreemathi.v

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Arrange the following alkenes in the increasing order of their heats of hydrogenation: 1.2-methyl butene,2.cis -2pentene,3.3-methyl butene

asked Dec 2, 2013 by sreemathi.v

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Vinyl cyclopropane on reaction with HBr yields which of the following as major product

asked Dec 2, 2013 by sreemathi.v

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The feasible region for an LPP is shown in the figure below ( fig 12.13 in textbook ).Let $F=3x-4y$ be the objective function.Minimum value of $F$ is

asked Aug 21, 2013 by sreemathi.v

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The feasible region for an LPP is shown in the fig.12.13.Let $F=3x-4y$ be the objective function.Maximum value of $F$ is

asked Aug 21, 2013 by sreemathi.v

1 answer

The feasible solution for a LPP is shown in fig.12.12.Let $Z=3x-4y$ be the objective function.(Maximum value of $Z$+Minimum value of $Z$) is equal to

asked Aug 21, 2013 by sreemathi.v

1 answer

The feasible solution for a LPP is shown in fig.12.12.Let $Z=3x-4y$ be the objective function.Maximum of $Z$ occurs at

asked Aug 20, 2013 by sreemathi.v

1 answer

The feasible solution for a LPP is shown in fig.12.12.Let $Z=3x-4y$ be the objective function.Minimum of $Z$ occurs at

asked Aug 20, 2013 by sreemathi.v

1 answer

In the figure below ,the feasible region (shaded)for a LPP is shown .Determine the maximum and minimum value of $Z=x+2y$

asked Aug 20, 2013 by sreemathi.v

1 answer

The feasible region for a LPP is shown in fig 12.10.Evaluate $Z=4x+y$ at each of the corner points of this region.Find the minimum value of $Z$,if it exists.

asked Aug 20, 2013 by sreemathi.v

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The feasible region for a LPP is shown in fig.12.9.Find the maximum value of $z=11x+7y$

asked Aug 20, 2013 by sreemathi.v

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The feasible region for a LPP is shown in fig.12.9.Find the minimum value of $z=11x+7y$

asked Aug 20, 2013 by sreemathi.v

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Feasible region (shaded) for a LPP is shown. Maximise $z=5x+7y$

asked Aug 20, 2013 by sreemathi.v

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Determine the maximum value of $z=3x+4y$ if the feasible region (shaded) for a LPP is shown in fig:

asked Aug 20, 2013 by sreemathi.v

1 answer

True or False. If two corner points of the feasible region are both optimal solutions of the same type, i.e., both produce the same maximum or minimum, then any point on the line segment joining these two points is also an optimal solution of the same type.

asked Apr 16, 2013 by balaji.thirumalai

1 answer

Let $R$ be the feasible region for a linear programming problem and let $Z = ax + by$ be the objective function. Say $R$ is unbounded, and a maximum or a minimum value of the objective function exists. If so, where can it exist?

asked Apr 16, 2013 by balaji.thirumalai

1 answer

Let $R$ be the feasible region for a linear programming problem and let $Z = ax + by$ be the objective function. Say the objective function Z has both a maximum and a minimum value on R and each of these occurs at a corner point (vertex) of R. For this to be true, R must be unbounded. True or False.

asked Apr 16, 2013 by balaji.thirumalai

1 answer

Let $R$ be the feasible region for a linear programming problem and let $Z = ax + by$ be the objective function. When $Z$ has an optimal value (maximum or minimum), where the variables $x$ and $y$ are subject to constraints described by linear inequalities, this optimal value must occur where in the feasible region?

asked Apr 16, 2013 by balaji.thirumalai

1 answer

Fill in the blank. Any point in the feasible region that gives the value (maximum or minimum) of the objective function is called solution.

asked Apr 16, 2013 by balaji.thirumalai

1 answer

True or False. The common region determined by all the constraints including non-negative constraints $\; x, y \geq 0$ of a linear programming problem is called the infeasible region.

asked Apr 16, 2013 by balaji.thirumalai

1 answer

Find the maximum and minimum values of 5x+2y subject to constraints \[-2x-3y\leq-6\]\[x-2y\leq2\]\[6x+4y\leq24\]\[-3x+2y\leq3\]\[x\geq0\;and\;y\geq0\]

asked Feb 5, 2013 by meena.p

0 answers

Determine graphically the minimum value of the objective function.\[z=-50x+20y\] subject to constraints \[2x-y\geq-5\]\[3x+y\geq3\]\[2x-3y\leq12\]\[x\geq0,y\geq0\]

asked Feb 5, 2013 by meena.p

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Solve the following LPP graphically. Minimize Z = 3x+5y subject to \[-2x+y\leq4\]\[x+y\geq3\]\[x-2y\leq2\]\[x,y\geq0\]

asked Feb 5, 2013 by meena.p

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Solve the following LPP graphically. Maximize or minimize Z = 3x+5y subject to \[3x-4y\geq-12\]\[2x-y+2\geq0\]\[2x+3y-12\geq0\]\[0\leq x\leq4\]\[y\geq2\]

asked Feb 5, 2013 by meena.p

1 answer

If a young man rides his motorcycle at 25 km/hr, he had to spend Rs.2 per km on petrol. If he rides at a faster speed of 40 km/hr, the petrol cost increases at Rs.5 per km. He has Rs.100 to spend on petrol and wishes to find what is the maximum distance he can travel within one hour. Express this as LPP and solve it graphically.

asked Feb 5, 2013 by meena.p

1 answer

A farmer has a supply of chemical fertilizer of type I which contains 10% nitrogen and 6% phosphoric acid and type II fertilizer which contains 5% nitrogen and 10% phosphoric acid. After testing the soil conditions of a field, it is found that atleast 14 kg of nitrogen and 14 kg of phosphoric acid is required for a good crop. The fertilizer type I costs Rs.2.00 per kg and type II costs Rs.3.00 per kg. How many kilograms of each fertilizer should be used to meet the requirement and the cost be minimum.

asked Feb 5, 2013 by meena.p

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