Utkarsh Gupta – Kailasha Foundation

ORGANIC CHEMISTRY REACTIONS

Utkarsh Gupta — Mon, 22 Apr 2019 16:18:37 +0000

please elaborate and explain all the organic reactions in chemistry in both class 11 and 12

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How much should the owner of the machine charge per hour of use?

Utkarsh Gupta — Thu, 07 Feb 2019 13:27:45 +0000

A truck dozer cost $16300 to purchase. Fuel, oil, grease and minor maintenance are estimated to cost $32 per hour. A major engine repair costing $12000 will probably be required after 7200 hr of use. The expected resale price (salvage value) is 21% of the original purchase price. The machine should last 10800 hr. How much should the owner of the machine charge per hour of the use if it is expected that machine will operate 1800 hr per year? The company’s cost of capital rate is 7.3%.

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Equation of parabola whose latus rectum is 4 units

Utkarsh Gupta — Thu, 07 Feb 2019 13:17:10 +0000

Find the equation of the parabola whose latus-rectum is 4 units, axis is the line 3x+4y-4 = 0 and the tangent of the vertex is the line 4x-3y+7=0.

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How much should the owner of the machine charge per hour of use

Utkarsh Gupta — Wed, 06 Feb 2019 18:03:52 +0000

A machine cost $245,000 to purchase. Fuel, oil, grease, and minor maintenance are estimated to cost $47.64 per operating hour. A set of tires cost $13,700 to replace, and their estimated life is 3,100 use hours. A $15,000 major repair will probably be required after 6,200 hr of use. The machine is expected to last for 9,300 hr, after which it will be sold at a price (salvage value) equal to 17% of the original purchase price. A final set of new tires will not be purchased before the sale. How much should the owner of the machine charge per hour of use, if it is expected that the machine will operate 3,100 hr per year? The company’s cost of capital rate is 8%.

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can the production manager conclude that the fruit cans were being overfilled

Utkarsh Gupta — Fri, 01 Feb 2019 10:19:42 +0000

The production manager of a fruit canning factory begins to suspect that as a result of observing the machine operators, the 16-ounce can of fruits may be slightly filled beyond the required weight. He takes q random sample of 80 packed cans and finds that the mean weight is 16.08 ounces with a standard deviation of 0.04 ounces at 1% level of significance. Can the production manager conclude that the fruit cans were being overfilled?

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Pyrolysis

Utkarsh Gupta — Sun, 27 Jan 2019 05:30:41 +0000

One often confuse with the combustion as well as pyrolysis however pyrolysis is completely a different process than combustion.

In pyrolysis, a bigger hydrocarbon in the absence of air breaks into smaller fragments by the application of heat. Since the pyrolysis happens in the absence of oxygen (air) so oxidation of hydrocarbon does not take place. Pyrolysis is more of a decomposition process carried out by thermal energy.

Generally, pyrolysis of alkanes is termed as cracking also.

Pyrolysis Process

In the absence of oxygen, the alkane in the vapour forms when passed over the red hot metal, it breaks down into the simpler hydrocarbons.

Very high temperature and pressure is required for the process to get executed in the absence of a catalyst. The catalyst such as Palladium and Platinum can help to carry out the process at low temperature and pressure.

This process is generally helpful in the fractional distillation of the petroleum. The large hydrocarbons obtained during the fractional distillation of crude oil can be broken down into smaller hydrocarbon using pyrolysis. The hydrocarbon molecule breaks down into the random manner and even some compound obtained after pyrolysis carries double bond too.

Pyrolysis of Alkanes

As the molecular weight and branching in alkane increases, the rate of pyrolysis is increases. This is opposite to what happens during combustion. The fission of C-C bond leads to the formation of alkanes and alkenes whereas the fission of C-H bond leads to the formation of methane (CH4) and Hydrogen (H2).

The fission of C-H bond takes place due to the catalytic action of Cr₂O₃, V₂O₂, MoO₃ and C-C bond fission occur under the presence of SiO₂, Al₂O₃, and ZnO.

The cracking of alkane is followed by the free radical mechanism.

The pyrolysis process is of prime importance for the petroleum industry. For e.g. Dodecane ( a component of kerosene oil) gives a mixture of heptane and pentane as pyrolysis products, on heating it to a temperature of 973K under the catalytic action of platinum, palladium or nickel.

C₁₂H₂₆→ C₇H₁₆+ C₅H₁₀ + other products

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IIT JEE Mock – 6

Utkarsh Gupta — Tue, 22 Jan 2019 05:30:29 +0000

IIT JEE Mock Test by KFDN

“IIT JEE” Mock Test is brought to you by Kailasha Foundation- Fun & Learn Portal to help you boost yourself for JEE, and other engineering entrance exams with our specially tailored content from the subject. With this test, we have delivered questions from the syllabus of IIT JEE exam to you in an interactive mock test environment which will help you for the preparation of your Exam.

Instructions:

You have 3 hours to attempt this test.
All questions carry equal marks and each correct answer will give you 4 marks.
You will be awarded minus one mark for each wrong answer.

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Other mocks for your preparation

Thermodynamics Mock 1

Thermodynamics Mock 2