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Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
The difference among Threshold energy and average energy of the molecules is known as activation energy.
Aluminium utensils should not be kept in water overnight.Give reason
Rayon - Semi Synthetic Polymers Rayon is a man made material which contains purified cellulose in the type of long fibres. Cellulose is reacted along with cold NaOH solution to
What are the Interfacial Defects Grain boundaries are interfaces where crystals of dissimilar orientations meet. A grain boundary is a single-phase interface, with crystals on
How many moles of gas occupy 98 L at a pressure of 2.8 atmospheres and a temperature of 292 K?
descuss properties of transition elements
what are the differences between positive and negative mesomeric effect
Functions of nucleic acid: Nucleic acid has two major functions (a) Replication and (b) Protein synthesis.
NaH + H2O ->
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