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Symmetry is a property of molecules having more than one atom of the same kind, with equal bond lengths and/or bond angles. As like the high symmetry of the SF6 molecule (Fig. 1. arises from the six equal S-F bonds disposed at angles of 90° to each other. In order to build the notion more precise we use the idea of a symmetry operation. For example rotating SF6 by 90° about an appropriate axis, it appears indistinguishable after the rotation. The axis concerned is known as the symmetry element. Rotations which do not leave the molecule looking the similar are not symmetry operations.
The following has zero valency : (1) Sodium (2) Beryllium (3) Aluminium (4) Krypton Ans: Krypton
Explain the following observations: (i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (z =29) in the first series of transition element
If the value of azimuthal quantum number is 3, the possible values of magnetic quantum number would be: (1) 0, 1, 2, 3 (2) 0, - 1, - 2, - 3 (3) 0 ± 1± 2,± 3
various types of medicines use in daily life? and classify them into analgesics, antipyretics, antibiotics, sedatives, antiseptics.
The table below gives intrinsic viscosity values determined by viscometry and weight- average molar mass values determined under the same conditions by static light scattering
assignment of plazma
The third line in Balmer series corresponds to an electronic transition between which Bohr's orbits in hydrogen: (1) 5 → 3 (2) 5 → 2 (3) 4→ 3
In an electrochemical cell a redox reaction perform in two halves. Electrons are liberated by the oxidation half reaction at one electrode and go through an electrical circuit
Imidazole Imidazole has one nitrogen that has the electronic character of the nitrogen in pyrrole, and one that is like the nitrogen in pyridine, except that it is somewhat m
what are the 4 unique properties of colloiods
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