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#questionproperties of p block elements ..
Q. What is the Structure of diborane? The structure of diborane is of great interest since it cannot be explained on the basis of simple theories of bonding. As mentioned earli
Silica glass: It is produced by heating pure sand to its melting point. Because of absence of refining agents, it is extremely difficult to get rid of all air-bubbles. Moreover, o
An element L has 9 protons and valency 1. Another element M has valency 3 and 5. What is the difference in the number of electrons in L and M ?
copper reacts with oxygen to form two oxide X and Y .On analysis 1.535g of X yielded 1.365g of copper and 1.450g of Y yielded 1.160g of copper. [I] determine the chemical formula
THERMOCHEMISTRY The enthalpy changes associated with reaction are dependent upon the temperature. They are also dependent upon the amounts, and the pressure and states of the r
Q. Define the Methods of shelf life examination? Methods of shelf life examination are sensory evaluation, chemical analysis and microbiological analysis.
preventive measures of priming and foaming
Q. Illustrate Egg White Foams? Egg white foams when whipped or beaten, the air gets entrapped in the liquid present, and an interfacial tension is established between the ai
The number of 2p electrons having spin quantum numbers= -1/2 are: (1) 6 (2) 0 (3) 2 (4) 3 Ans: 3
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