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A 0.5M solution of NaNO2 is made. What is the pH of the solution?
Q. Explain: Vulcanization of rubber is necessary. Ans. Importance of vulcanization of rubber: 1. Vulcanization makes cross-links between the long unsaturat
An organic compound is any member of a large class of chemical compounds which molecules have carbon and hydrogen; thus, carbides, carbonates, carbon oxides and elementary carbon
Q. What do you mean by Isotopes? Isotopes and mass number although all atoms of an element have the same number of protons most elements have atoms with different numbers of ne
Existence of positively charged nucleus was established by: (1) Positive ray analysis (2) α -ray scattering experiments () X-ray analysis (4) Discharge tube exper
algae
If the velocity of hydrogen molecule is 5x 10 4 cm sec -1 then its de-Broglie wavelength is: (1) 2 Å (2) 4 Å (3) 8 Å (4)100 Å Ans: 4 Å
explain zone refining method of purification of silicon
Q. Describe about Electron Configurations? As you will study the number and arrangement of electrons around the nucleus of an atom determines its chemical properties. Consequen
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