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The correct sequence of increasing covalent character is represented by:
(1) LiCl < NaCl < BeCl2
(2) BaCl2 < NaCl< LiCl
(3) NaCl < Licl < BeCl2
(4) BeCl < Licl < NaCl
Ans: NaCl < Licl < BeCl2
Properties and uses of D.D.T. (i) D.D.T. is approximately insoluble in water although it is moderately soluble in polar solvents. (ii) D.D.T. is a powerful insecticide. It i
Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
What is difference between silica used in TLC and HPLC column? TLC is called thin layer chromatography. The simple technique works on the principle of adsorption, where as HPLC i
The difference among Threshold energy and average energy of the molecules is known as activation energy.
uses of salt
Can we vary the pressure while phases remain in equilibrium? Consider a system containing only NH 4 Cl(s), NH 3 (g), and HCl(g). Assume that the equilibrium NH 4 Cl(s) ↔ NH
Which of the following principles/rules limits the maximum number of electrons in an orbital to two: (1) Aufbau principle (2) Pauli's exclusion principle (3) Hund's rule
ABAOUT ANY MAGNATIC CALCULATION OF TRANSAYION ELEMENT.
Complexes
Reactions of Benzene Nucleus - Nitration Phenol reacts along with dilute nitric acid at 5-10°C to form ortho and para nitro phenols, although the yield is meager because of oxi
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