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how periodic table is helpful in chemistry give two example
THermodynamic free enrgy is the amount of work a thermodynamic system can perform. The concept is useful in the thermodynamics of chemical or thermal processes in engineering and
what is nobel gasses
The present atomic weight scale is based on: (1) C 12 (2) O 16 (3) H 1 (4)C 13 Ans: C 12
Most of the transition metal do not displace hydrogen from dilut acid. why? Ans) The activity series of transition metals is less than that of hydrogen so they can not displace h
Illustrate the following observations: (a) Cottrell's smoke precipitator is fitted at the mouth of the chimney used in factories. (b) Ferric hydroxide sol. Gets coagulated
Why a covalent bond is directional? The covalent bond is formed as a result of pairing of two electrons in the atomic orbitals of two atoms. The bond then should lie along the
Q. Explain Preservation by Preservatives? Preservatives, as you may already know, belong to a class of food additives that extend shelf life by inhibiting microbial growth, o
The electronic configuration of a metal M is 1s 2 , 2s 2 , 2p 6 , 3s 1 , The formula of its oxides will be: (1) MO (2) M
give me two examples of compounds formed by s - blockmetals
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