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Q. Explain Dalton’s atomic theory?
The atomic theory In 1808 John Dalton projected a theory to explain the laws of conservation of matter definite proportions and multiple proportions. Dalton's atomic theory base on experimental results held that matter consists of atoms that all atoms of an element are alike and that atoms of one element differ from atoms of other elements. Further the theory proposed that atoms were indestructible and only were rearranged during chemical reactions.
The following has zero valency : (1) Sodium (2) Beryllium (3) Aluminium (4) Krypton Ans: Krypton
Calculate how the internal energy stored in one O-H bond of H20 Consider the following chemical reaction H20(g)-->2H(g) + O(g) at 298.15 K and 1.00 Bar fH* [H(g)]=218.0 kJ/mole fH*
Q. Define Conjugate acid-base pair and buffer? Buffers are substances that resist changes in pH. To "balance pH" means to buffer. Weak acids and bases make good buffers.
Q. Explain Ligand field theory? The bond approach, though not as perfect, is more useful. Here we do all the calculations based on crystal field theory. The differences between
What are laws of crystallography? How does it help in study of crystal structure?
what happens to the reaction rate when the concentration changes
electro negetivity
A sample of water collected in the field had a pH of 6.8. By the time it was analyzed in the lab, the pH had decreased to 6.0. Give a possible explanation.
Q. why is sodium aluminates is a better coagulates then ferrous sulphates or alum? Ans. Sodium aluminates (NaAlO 2 ): It is better coagulant than FeSO 4 and alum because i
Question: Does the number of steps in a reaction process affect the enthalpy change of the overall reaction? Hypothesis: To compare experimental data to functionality of He
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