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How many unpaired electrons are present in Ni2+ cation (atomic number = 28):
(1) 0
(2) 2
(3) 4
(4) 6
Ans: 2
Freons - Halogen Derivatives The chloro fluoro that is derivatives of methane and ethane are called freons. Some of the derivatives are: CHF 2 Cl (monochlorodifluoromethane)
Q. What is sensory evaluation? Foods have several characteristics that require evaluation by sensory methods. The various food attributes that are judged on the sensory scale a
Atoms in the water molecule are linked by: (1) Electrovalent bond (2)Covalent bond (3) Coordinate covalent bond (4) Odd electron bond Ans: Cov
Sphere packing Element structures where chemical bonding is nondirectional are best explained by considering the packing of equal spheres. Close-packed structures are on
If the water molecules in 1g of water were uniformly distributed on earth surface , how many such water molecules would there be in 1 cm^2 of earth? Solution) No. of molecules in
THermodynamic free enrgy is the amount of work a thermodynamic system can perform. The concept is useful in the thermodynamics of chemical or thermal processes in engineering and
What is gattermann Koch reaction?
explain,anamalous behavior of oxygen
describe the comparative study of physical and chemical properties of p block elements.
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