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Five Year Papers (MUMERICALS)
1. Simplify according to the rule of significant figure . 2. The atomic mass of Zn is 65.4 a.m.u. Calculate (i) the number of moles and also the number of atoms in 10.9 gm of Zn. (ii) The mass of 1.204 x 1024 atoms of Zn in gm. 3. Adipic acid is used in the manufacture of Nylon. The acid contains 49.3%C, 6.9%H and 43.6%O by mass. The molecular mass of the acid is 146 a.m.u. Find the molecular formula of the Adipic Acid.
Five Year Papers MCQ's
1. The process in which a solid directly changes to vapours without melting is called __________. (Evaporation, Condensation, Sublimation) 2. The oxidation number of P in PO3-4 is __________. (3 , 5 , 3-) 3. The pH of 0.001 M HCl is __________. (2, 4, 3) 4. K ( rate constant) is dependent on __________. (temperature, concentration, volume) 5. The universal indicator in water shows the colour __________. (red, green, blue)
Three States Of Matter Matter
It is defined as any thing which has mass and occupies space is called matter. Matter is composed of small and tiny particles called Atoms or molecules. It exist in three different states which are gaseous, liquid & solid. Properties of Gas 1. It has no definite shape. 2. It has no definite volume, so it can be compressed or expanded. 3. A gas may diffuse with the other gas. 4. The molecules of a gas are in continuous motion.
Atomic Structure Atomic Structure Introduction About
Atomic Structure Introduction About the structure of atom a theory was put on by John Dalton in 1808. According to this theory matter was made from small indivisible particles called atoms.
Introduction to Fundamental Concepts CHEMISTRY
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