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ENTROPY Entropy is a thermodynamic property of a system. It is denoted as S and like as the enthalpy and internal energy, it is a state function. In thermodynamic expression, e
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
1s 2 , 2s 2 , 2p 6 3s 1 shows configuration of: (1) Al 3+ in ground state (2) Ne in excited state (3) Mg + in excited state (4) None of these Ans: Mg + in
The first ionization potentials for Na, K, and Rb are 5.138, 4.341, and 4.166 eV, respectively. Assume that the energy level of the outer electron can be represented by a hydrogenl
why is electron gain enthalpy of oxygen greater than sulphur?
Q. Illustrate Ionic Bonds or electrovalent bond? Ans. An ionic bond (also called an electrovalent bond) is the attraction between oppositely charged ions. Elements from o
Reaction of conjugate addition This reaction is a "conjugate addition" of cyanide ion on a cyclopropane. Notice that reaction at the least branched carbon of the cyclopropane
Q. Describe properties and uses of different silicate glasses and also discuss the importance of annealing in the manufacture of glass.
Q. What is standard electrode potentials of lanthanides? The standard electrode potentials of lanthanides for the half reaction Ln 3+ (aq) + 3e ----------------> Ln (s)
properties and uses of glycol?
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