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A chemical change takes place when one or more substances change into new substances. A chemical change is as well known as a chemical reaction. The emergence of new substances is the sign that a chemical reaction has occurred. In a chemical effect the substances present at the start are called reactants. The new substances which are formed in the reaction are called products. A chemical reaction is symbolized by a chemical equation which shows the relationship between reactants and products.
Q. Determine the specific heat and claculate the total heat transfer? Ans. If a mug full of coffee has about 350 g of liquid inside, how much heat is lost as it cools from 87 o
Q. Explain the working of chemical cell ? Ans. A chemical cell can be set up by dipping two different metals in an electrolyte and connecting the two metals with an external
what is the role of structural protein, their types, how are they formed, significance.
Soaps and detergents Sodium and pottasium salts of fatty acids such as palmitic acid, stearic acid, oleic acid etc are called soaps, while detergents are ammonium or sulphonate
A solution contains an unknown amount of osmium at the µg/g level, or below. Chemically pure osmium (Os) may be separated from the solution, but the chemical yields are variable an
Difference between diagonal relationship between Be and Al
The charge on the atom containing 17 protons, 18 neutrons and 18 electrons is: (1) +1 (2) -2 (3) -1 (4)Zero Ans: -1
Merits of Atomic fluorescence spectrometry: Merits of the technique involve extremely low detection limits for favourable elements and the possibility of handling solid, liqui
In the formation of Nacl from Na and cl: (1) Sodium and chlorine both give electrons (2) Sodium and chlorine both accept electrons (3) Sodium loses electron and chlori
The frequency corresponding to transition n= 2 to n =1 in hydrogen atom is: (1) 15.66 x 10 10 Hz (2) 24.66 x 10 14 Hz (3) 30.5
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