Ist year chemistry

Feb 3rd, 2012
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This document includes basic concepts related to chemistry such as mole ,avogadro's number basic techniques of chemistry gases liquids solids and atomic structure.

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Pakistan Leadership AcademySubject: Chemistry Objective Class 1st year Chapter: 1-5 Marks: 10 Name: __________________________________________________________Section - A i. Atomic mass of an element expressed in grams is called (A)1 g atom(B)1 g mole of that element (C)1 mole of that element(D)All of themii. The largest number of molecules are present in (A)3.6 g of H2O (B)4.8 g of C2H5OH (C)2.8 g of CO (D) 5.4 g of N2O5iii. Which one of the following contain the same number of as 1 g of H2 (A) 22 g of CO2 (B) 8 g of CH4 (C) 20 g of Ne (D) 8 g of O3iv. Which one of the following noble gases have low critical temperature? (A) He(B

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