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what are the properties of acid halides
why original solution is prepared during basic radical analysis
The number of unpaired electrons in 1s 2 2s 2 2p 4 is: (1) 4 (2) 2 (3) 0 (4) 1 Ans: 2
The covalent bond produced by the unequal sharing of electrons among the two atoms is known as polar covalent bond.
The radius of the nucleus is related to the mass number A by : (1 )R= R 0 A 1/2 (2) R= R 0 A (3) R= R 0 A 2
Where is tin obtained? Ans) Tin is obtained in several places tin is found mainly in the ore cassiterite, which is originate in Malaysia, Bolivia, Thailand, and Nigeria.
what is P and N junction
5H is the most stable, and the least stable isotope is 7H
The ratio of the energy of a photon of 2000Å wavelength radiation to that of 4000 Å radiation is: (1) 1/4 (2) 4 (3) 1/2 (4) 2 Ans
The charge on the atom containing 17 protons, 18 neutrons and 18 electrons is: (1) +1 (2) -2 (3) -1 (4)Zero Ans: -1
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