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Which of the following explains the sequence of filling the electrons in different shells:
(1) Hund's rule
(2) Octet rule
(3) Aufbau principle
(4) All of these
Ans: Aufbau principle
If the velocity of hydrogen molecule is 5x 10 4 cm sec -1 then its de-Broglie wavelength is: (1) 2 Å (2) 4 Å (3) 8 Å (4)100 Å Ans: 4 Å
Nitration or Direct method The number of - NO 2 groups introduced in benzene nucleus relies upon the nature and concentration of the nitrating agent, temperature of nitration
why is ethanol used as an solvent in substitution reactions? ethanol is used as an solvent because it is soluble in water and also it is more reacive.... Ethanol is used u
Sources of antioxidants The primary biological role of antioxidant is in preventing the damage that reactive free radical can cause to cells and cellular compounds. In fact, al
Explain carbocation intermediate When 3-methyl-1-butene undergoes acid-catalyzed hydration, rearrangement happens because carbocation intermediates are included. (See the solut
Types of spectrometers: The two types of spectrometers for ICP-AES are: sequential spectrometers and simultaneous spectrometers. Those have the capabilities of measuring the v
what the uses of NH4Cl,NH4OH and HCL,H2S in qualitative analysis?
where is the asterisk located
Physical properties of alkyl halides (1) Physical state: Methoxy methane and methoxy ethane are gases whereas other members are volatile liquid along with pleasant smell.
Aldehyde is a carbonyl compound in which one valency of carbonyl carbon is satisfied by hydrogen atom and other by a alkyl group.
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