General
বিভিন্ন যৌগকে বাদামি বোতলে সংরক্ষন করার কারন কি?
প্রায়ই বেশ কিছু রাসায়নিক যৌগকে বাদামি বোতলে সংরক্ষন করতে দেখা যায় এর উদ্দেশ্য হল ওই প…
General
Different kind of enthalpy/ heat changes.
change of heat in a reaction is the change in enthaply, the energy evolved or consumed obviously in a reaction is termed as enthalpy change in mode…
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General
8 most funny reaction in chemistry.
Chemistry is a fun! convertion of colors by adding one to another, Changing of smell mind blowing to pungent, Explosion of lights, rain in a testube…
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General
Different method for expressing the concentration of a solution.
The concentration of a solution means that the amount of solute present in a definit volume. the methods for expressing concentration and convertion…
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Environmental
All about Carbon dioxide pollution.
Carbon dioxide pollution. Carbon dioxide(CO2) is present in atmosphere about 0.0325 % which does not act as a pollutant I.e it has no adverse e…
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Environmental
All about carbon monoxide(CO)
Carbon monoxide is an unstable molecule readily convert into carbon dioxide (CO2). But somehow it is inhaled by human or animal it works as a "…
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Inorganic
Why boiling point of CCl4 is grater than that of SiCl4 ?
The thermal stability of halides of group 14 elements is decreases in group and the trend is : CX4>SiX4 >GeX4 >SnX4>PbX4. The boilin…
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Inorganic
Why NF3 is stable while NCl3 and NI3 is explosiv?
In NF3 molecule nitrogen is in +3 oxidation state and the fluorin atom is in -1 oxidation state. We know according to the pouling scale of elec…
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Inorganic
Why PCl5 exist but PH5 does not exist?
In PH3 and PCl3 orbital overlapping Is different. We know hydrogen has only one orbital and is s orbital and phosphorus has P orbital in its ult…
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theory
Limitations of valence bond theory.
Though valence bond theory has many importance it can explain structure magnetic properties and bonding of some complex compound but it has som…
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theory
Description of Valence bond theory.
theory is mainly due to pauling. It deals with the electronic structure ( configuration ) of the central metal ion in the central metals groun…
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General
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