class 9 th student waiting unconsciously for chemistry guess paper 2014. Dear students of all boards as you know in these days many students search for guess papers for 9th and 10 th specially chemistry subjects 2014. Chemistry guess papers class 9 th and 10 th 2014 lahore board 9th class chemistry past papers includes the last five years past papers and guess papers so that the students of 9th class could perform well in the annual examination. These past papers are the best way if a students wants to get good marks in the 9th class as it is very important class in the students career. In the 9th class students have two choices that whether to go for the arts subjects or science subjects and when a candidates choose science subjects then the chemistry subject is compulsory on every students.

In pakistan there are thousands of students who appear in the annual examination of 9th class under the board of intermediate and secondary education lahore as it is the biggest and oldest educational board among all other 9 boards in punjab taking care of all the educational matter of matric and intermediate class. Almost 60% of the students of 9th class choose science subjects and appear in the chemistry subjects too. Well that is the reason that we have collected lahore board chemistry past papers of 9th class so that students can easily view and download the last 5 years past papers from this page easily.

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Chemistry is a branch of physical science that deals with the composition and change of matter. This course starts in the 9th class as before the 9th class students do not have any how now about the compositions of the matters so that is why here in the 9th class just the basic starts to teach the students that what is chemistry and how it deals with other. As this subjects includes in the syllabus first time in the students life that is why some students face little difficulty while reading this. That is why here you can easily download the lahore board 9th class chemistry past papers so click on the link and view past paper. Right click on the image and then click on the save image as so that it could be saved to your computer and whenever you want to view it you just have to sit in front of your computer and file will be opened. These chemistry past papers will also help you in knowing some important question papers as there are some questions that are very important and paper setter could not stop himself to put it in the examination.

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download faisalabad board 9th and 10th class class x amp xi physics, chemistry, biology, english, science, urdu, islamyat, pak study, computer guess papers, old papers, solved papers and past papers establishment of educational culture is our national aspiration. Human resource development, talent promotion and overall societal uplift are its direct outcomes. Examinations and evaluation system are the key indicator of the success of any educational system. note: all published material contains an informatory data which is only gathered for educational purpose. Our entire team and/or publishers are not responsible in case of variation in assumed results and outcomes. However the purposes of attempted efforts are to provide accurate and effective knowledge to the readers, in any case our entire team and/or publishers will not be responsible for the accuracy or misusage of all published material.

The properties of cathode rays were determined and they led to the discovery of electron. He proposed that an atom contains nucleus at the center and electrons revolve around this nucleus. Isotopes are defined as the atoms of elements that have the same atomic number but different atomic mass. Hydrogen, carbon and uranium have three isotopes each, whereas chlorine has two isotopes chemistry is study of composition and properties of matter. Compounds are formed by chemical combination of atoms of the elements in a fixed ratio. Each atom of an element has a specific atomic number z and a mass number or atomic mass a.

Relative atomic mass of an element is the mass of an element compared with 1/12 mass of an atom of c 12 isotope. Atomic mass unit is 1/12 of the mass of one atom of c 12, lamu 1.66 x l0 24g empirical formula is the simplest type of chemical formula, which shows the relative number of atoms of each element in a compound. Molecular formula gives the actual number of atoms of each element in a molecule.

Formula mass is the sum of atomic masses of all the atoms in one formula unit of a substance. If it has positive charge it is called a cation and if it has negative charge it is called an anion. There are different types of molecules: monoatomic, polyatomic, homoatomic and heteroatomic. The number of particles in one mole of a substance is called avogadro’s number. The value of this number is 6.02 x 1023 it is represented as na the amount of a substance having 6.02 x 1023 particles is called a mole. The quantitative definition of mole is atomic mass, molecular mass or formula mass expressed in grams. These sample papers are of physics, chemistry, math, biology, english, urdu, pak studies subjects.