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Q. Describe the Half -Life property of radioactive decay? Ans. The decay of a nucleus is a random event. It is impossible to predict which nucleus will decay and when.
For principle quantum numbern= 4 the total number of orbitals having l=3: (1) 3 (2) 7 (3) 5 (4) 9 Ans: 7
Charactaristics of elements of group
Saponification value - Analysis of oils and fats It is quantify of fatty acids denote as esters in oils and fats. It is described as the number of milligrams of KOH needed to s
The uncertainty in momentum of an electron is 1 x10 -5 kg- m/s . The uncertainty in its position will be (h= 6.62 x 10 -34 kg - m 2 / s): (1) 1.05 x 10- 28 m
Q. Show the Occurrence of Metals? Earth's crust and sea are the two main sources of metals. In the earth's crust metals occur both in the combined state in the form of minerals
Why there are tie lines for 3 phase equilibrium however not for 2-phase equilibrium in a two-component system? Lever rule derived from mass balance gives the relative amounts o
An e - has magnetic quantum number as 3, what is its principal quantum number: (1) 1 (2) 2 (3) 3 (4) 4 Ans: 4
What does the HA and A- stand for in buffer solution equations? Ka=HA/A-
alkali metals belong to s-block in the periodic table.why?
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