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electrophilic substitution reactions and mechanisms
The valency of phosphorus in H3 PO 4 is: (1) 2 (2) 5 (3) 4 (4) 1 Ans: 5
Q. What is Alloys? Metals have a property of combining with other metals to form alloys. An alloy may be defined as a solid which is formed by a combination of two or more met
In a heteronuclear molecule a bond is build between different atoms, and the most important difference from the homonuclear case is that molecular orbitals (MOs) are no longer sh
What are the advantages of graphite furnace AAS? tell the history of graphite furnace AAS
Number of nodal centres for 2s orbital: (1) 1 (2) 0 (3) 4 (4) 3 Ans: 1
Q. Determine the frequency of light wave? Ans. The wavelength of red light is 7.0 x 10 -7 m. What is the frequency? c = λv The first thing to remember here is that
Each element has a unique number of protons. This unique number is known as the element's atomic number . All atoms of a given element have the same atomic number. For example:
The interatomic distances in H 2 and Cl 2 molecules are 74 and 198 pm respectively. The bond length of HCl is : (1) 272 pm (2) 1
General Organic Chemistry Carbon is an necessary element of organic substance; it has four electrons in its outer most shell. As per to the ground state electronic arrangeme
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