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Highest covalent character is found in:
(a1 CaF2
(2) CaCl2
(3) CaBr2
(4) Cal2
Ans: Cal2
The number of unpaired electrons in 1s 2 2s 2 2p 4 is: (1) 4 (2) 2 (3) 0 (4) 1 Ans: 2
According to Heisenberg's uncertainty principle, the product of uncertainties in position and velocities for an electron of mass 9.1x 10 -31 kg is: (1) 2.8x 10 -3 m 2 -s -1
Q. Describe about Dioxides? These are generally obtained by heating the element in air. The dioxides of Se and Te can also be prepared by treating the element with conc. HNO, f
get calcium EDTA from disodium EDTA and calcium which in complexomteric reaction. how mechanism of making ??
A sample of water collected in the field had a pH of 6.8. By the time it was analyzed in the lab, the pH had decreased to 6.0. Give a possible explanation.
Radius of the first Bohr's orbit of hydrogen atom is: (1)1.06 Å (2) 0.222 Å (3) 0.28 Å (4)0.53A Ans: 0.53 Å
conductometric titratins : weak base within a weak acid
Explain in detail about the Chemical vapaor deposition Chemical vapaor deposition (CVD) is a chemical process used to produce high-purity, high-performance solid materials. P
PERIODIC TABLE and PERIODICITY OF ELEMENT
chemicals in food
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