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Be2+ is isoelectronic with:
(1) Mg2+
(2) Na+
(3) Li+
(4) H+
Ans: Li+
The value of Planck's constant is 6.63x 10 -34 Js. The velocity of light is 3.0x 10 8 ms -1 . Which value is closest to the wavelength in nanometres of a quantum of light with
#question.define .
write the structures of the major product (saytzeff elimination) when the following alcohols are dehydrated with hot,concentrated sulphuric acid. 1. 3-methyl-2-butanol 2. 2-pentano
Energy of atomic orbitals in a particular shell is in the order: (1) s (2) s> p > d > f (3) p (4) f > d > s >p Ans: s
Why boron is electron-deficient (a) Every atom has an octet; thus, this is not an electron-deficient compound. (b) The boron is electron-deficient because it has a sextet o
Why cyclo propane is more stable than cyclohexane
Rutherford's scattering experiment is related to the size of the: (1) Nucleus (2) Atom (3) Electron (4) Neutron Ans: Nucleus
Functional Foods Traditionally, food products have been developed for taste, appearance and convenience for the consumer. With the increasing awareness of the role of diet in
A solution contains an unknown amount of osmium at the µg/g level, or below. Chemically pure osmium (Os) may be separated from the solution, but the chemical yields are variable an
examples of antifertility drugs
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