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Knocking - Characteristics of hydrocarbons
The metallic sound throughout working of an internal combustion engine is known as knocking.
"As much the compression greater will be efficiency of engine." The fuel along with minimum (least amount) knocking characteristic is all the time preferred.
The trend to knock falls off in the given sequence: Straight chain alkanes > branched chain alkanes > olefins > cyclo alkanes > aromatic hydrocarbons.
A 64-g sample of germanium-66 is left undisturbed for 12.5 hours. At the end of that period, only 2.0 g remain. What is the half-life of this material? 4. With a half-life of 28.8
which of the following has smallest heat of hydrogenation per mole A) 1-Butene B)trans-2-butene C)cis-2-butene D)1,3-butadiene Ans) D)1,3-
Method for Detection of Elements - Phosphorus Phosphorus is detected through fusing the organic compound along with sodium peroxide while phosphorus is converted into sodium ph
Anomalous behaviour of boron
Which of the following sets of quantum numbers is not allowed : (1) n=1, l=0,m=0 s= +1/2 (2) n=1, l=1,m=0 s= -1/2 (3) n=2, l=1,m=1 s= +1/2
when these are combined...what do they make? And what is it used for?
What is the difference between a theory and a hypothesis? What is the difference between a hypothesis and a law? Is there a sequential move from one to another, amongst law, theory
Characteristic of co-ordinate compound
Q. Explain Lead chamber process? Lead chamber process, is the older of the two processes. In this process SO 2 , is produced by burning S or roasting pyrites. S + O 2 -
The principal quantum number represents : (1) Shape of an orbital (2) Distance of electron from nucleus (3) Number of electrons in an orbit (4) Number of orbitals in an
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