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Which of the following is isoelectronic with carbon atom:
(1) Na+
(2) Al+3
(3) O2-
(4)N+
Ans: N+
Ask quThe maximum number of electrons which each sub-shell can occupy is 2(2l+1)
define packing of atoms...
why isoquinoline is weak base as compare to quinoline?#
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Calculate the ratio of d number of molecules in two energy levels at 27''c given E2=9.75x10"-13erg/mol E1=6.95X10"-13erg/mol g1=2 g2=3
Q. Use of Halides of Boron? Boron trihalides of the type BX3 exist for all the four halogens. Boron trifluoride can be prepared on a large scale by the fluorination of boric ox
x(2x^-1/4)^4
The boron trihalides are highly volatile; BF 3 (b. p., 173 K) and BCI 3 , (b. p., 260.5 K are gases, BBr 3 a volatile liquid (b. p., 319 K) and Bl 3 a low melting solid (m. p.,
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