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Which of the following has maximum number of unpaired electron (atomic number of Fe 26):
(1) Fe
(2) Fe (II)
(3) Fe (III)
(4) Fe (IV)
Ans: Fe (III)
The heat of combustion for ethane, C 2 H 6 , is 52.0 kJ/g. How much heat could be released if 1 mol of ethane undergoes full combustion? Answer:
What is water?
Elements of Group 13 are namely, boron, aluminium, gallium, indium and, thallium. While studying the alkali and alkaline earth metals, you have seen that all the elements of these
When an electron jumps from lower to higher orbit, its energy : (1) Increases (2) Decreases (3) Remains the same (4) None of these Ans: Increases
How many gaseous elements are there in the s block of modern periodic table? What are they??
laboratory preparation
explain about law of chemical combinations in about 200 words?
GLASS: Glass is amorphous solid which is not true solid, it is rather super cooled liquid which possesses a very high viscosity. It has no fixed melting point, on heating graduall
Q. Beneficiation of Ores? Most of the ores available in nature contain large amounts of impurities, i.e. gangue. Direct extraction of metals from the ores by metallurgical proc
Explain heat of formation Although both molecules have bridgehead double bonds, the double bond in compound B is more twisted, and a model of this molecule is more complex to b
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