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Q. Show the Multiple covalent bonds between electron pairs?
Ans.
Two atoms may share one electron pair, two electron pairs or three electron pairs. The bonds formed in this way are called a single bond, a double bond or a triple bond. The following diagram shows the electron dot structures for double and triple bonds:
A shared electron pair is also known as a bond pair. Other non-bonding electron pairs in the outermost shells are called lone pairs. The bond pairs and lone pairs can be shown as follows:
Which of the following reduces the activation energy of a chemical reaction?
The ground state term symbol for an electronic state is governed by : (1) Heisenberg's principle (2) Hund's rule (3) Aufbau principle (4) Pauli exclusion principle
Aldehyde is a carbonyl compound in which one valency of carbonyl carbon is satisfied by hydrogen atom and other by a alkyl group.
Q. Define shelf life? Shelf life is the time between the production and packaging of the product and the point at which it becomes unacceptable under defined environmental cond
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Uses of Formic acid - Carboxylic acids (a) Formic acid is used in the laboratory for preparation of carbon monoxide. (b) Formic acid is used in the preservation of fruits.
Aufbau principle is not satisfied by: (1) Cr and Cl (2) Cu and Ag (3) Cr and Mg (4) Cu and Na Ans: Cu and Ag
write short note on vulcanization?
During a titration with EDTA, using eriochrome black T as indicator to determine Ca 2+ , an analyst obtained the following volumes of EDTA in three different trials: 5.01, 4.93 an
Compare the combustion energy stored in a 1 litre bottle of propane and butane. Suppose that the product temperature is 100°C. The density of liquid propane is 0.493 g cm -3
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