KPK Board 12th class Chemistry Ch 15 Organic Compounds short questions answers

We are providing all Students from 5th class to master level all exams preparation in free of cost. Now we have another milestone achieved, providing all School level students to the point and exam oriented preparation question answers for all science and arts students.

After Online tests for all subjects now it’s time to prepare the next level for KPK board students to prepare their short question section here. We have a complete collection of all classes subject wise and chapter wise thousands questions with the right answer for easy understanding.

We provided 12th class Chemistry short questions answers on this page of all KPK boards. Students of KPK boards can prepare the Chemistry subject for annual examinations.

In this List we have included all KPK boards and both Arts and Science students. These Boards students can prepare their exam easily with these short question answer section

Malakand Board 12th classes short questions Answer

Mardan Board 12th classes short questions Answer

Peshawar Board 12th classes short questions Answer

Swat Board 12th classes short questions Answer

Dera Ismail Khan Board 12th classes short questions Answer

Kohat Board 12th classes short questions Answer

Abbottabad  Board 12th classes short questions Answer

Bannu Board 12th classes short questions Answer

All above mention KPK Boards students prepare their annual and classes test from these online test and Short question answer series. In coming days we have many other plans to provide all kinds of other preparation on our Gotest website.

How to Prepare KPK Board Classes Short Question Answer at Gotest

  • Just Open the desired Class and subject which you want to prepare.
  • You have Green bars which are Questions of that subject Chapter. Just click on Bar, it slides down and you can get the right answer to those questions.
  • You can also Rate those question Answers with Helpful or not to make it more accurate. We will review all answers very carefully and also update time to time.

Now you can start your preparation here below

What is meant by the organic compound and organic chemistry?
Organic compounds are compounds containing carbon which are obtained from living things as well as prepared in laboratories. In simple words carbon containing compounds are organic compounds.

Organic Chemistry is the branch of chemistry in which we deals with the study of carbohydrate compounds and their derivative.

What diluted HNO3 is added to the sodium extract before detection of halogens in organic compound.
Diluted HNO3 is used before the detection of halogens when sulphur and nitrogen both present in organic compound because diluted HNO3 will decompose cyanide and sulphides during the formation of lessigne solution. If these cyanides and sulphides are not removed then they will give a white and black precipitation upon addition of AgNO3 which will mislead the result.

NaCN + HNO3 à NaNO3 + HCN

Na2S + HNO3 à2NaNO3 + H2S

Explain the significance of Wohler’s work in devolvement in organic chemistry?
In 1828, a German chemist Friedrick Wohler heated ammonium cyanide and prepared urea. It is a organic compound and the urea formed in this way is identical to the urea present in urine. After this experiment a number of organic compounds were prepared in laboratories.
Although Bucky ball is an allotropic form of carbon but it is included in organic chemistry?
Among the allotropic form of carbon i.e. graphite, diamond, and Bucky ball, only Bucky ball is included in organic chemistry. This is because of following characteristics reactions which are not shown by other form of carbon.

Hydrogenation: Fullerenes are easily hydrogenated by several methods to C60H18, C60H36.

Bromination: Bucky ball can added up 24 bromine atoms to the sphere C60Br24. Fluorine can also be added up C60F48.

Friedel-Craft Alkylation: Buck ball ann react with carbo-benzene and aluminum chloride in a fiedel-craft alkylation type reaction.

What are those compounds which although contain carbon but are not considered organic?
Carbon dioxide CO2, Carbon mono oxides CO, carbonates CO3-2, bi carbonates HCO3, Cyanides CN, contains carbon but they are inorganic in nature due to their properties and origin.
Differentiate between partial and total synthesis?
Partial Synthesis: organic compounds prepared derived from organic materials. Many steps are involved or it’s a multistep process. It does not involve any new routes or process for synthesis of a compound. I.e. conversion of aniline to phenol through series of reaction is a partial synthesis.

Total Synthesis: organic compound prepared from inorganic material. A single or two step processes for synthesis. It involves new process or routes for the synthesis of an organic compound. Example conversion of ammonium cyanides to urea is a total synthesis.

How coal can be converted into petroleum?
We obtained the coal gas by destructive distillation of coal and can be converted in to petroleum by a process now as Fisher-Tropsch process. In this process mixture of carbon mono oxides and hydrogen convert into liquid hydrocarbon mainly alkanes:

(2n+1)H2 + nCO à CnH2n+2 + nH2O

Discus the reason for presence of large number of organic compounds?
The reason for the presence of so many organic compounds lies in the nature of carbon atom. Carbon atom has the ability to from single double and triple bond with each other and also with other elements. The self-linkage of carbon with each other is called catenation. This is responsible for the presence of large variety of organic compounds in nature.
Differentiate between acyclic and cyclic organic compound?
Acyclic Compound: open chain compounds in which carbon atom is linked with other carbon in open chain. General formula is CnH2n+2. They have two hydrogen more than cyclic compounds. Melting point, boiling point and densities of open chain compound are less then cyclic compounds. Example CH3-CH2-CH2-CH2-CH2-CH3.

Cyclic Compound: Ring or closed chain compounds in which carbon is attached with each other in the form of ring. General formula is CnH2n. They have two less hydrogen atoms than open chain compounds. Melting point, boiling point and densities are more due to more compact structures. Example cyclo-prpane, cyclo-butane.

What are fossil fuels? Discuss different types of fossil fuels.
Any combustible organic martial primarily coal, oil and natural gas formed from died plants and animals is called fossil fuel. There are many types of fossil fuel.

Coal: coal is a solid black or brownish black sedimentary rock usually found in layers called coal beds, coal is the major source of energy all over the world.

Petroleum: Petroleum is a dark brown or greenish black viscous liquid occurring at a depth of 500ft or more under the earth surface.

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button