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When the azimuthal quantum number has a value of l= l , the shape of the orbital is:
(1) Unsymmetrical
(2) Spherically symmetrical
(3) Dumb-bell
(4)Complicated
Ans: Dumb-bell
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
Conjugate-base anion of diethyl malonate The conjugate-base anion of diethyl malonate would be formed with sodium ethoxide, but it would not react with bromobenzene due to the
The quantity of heat liberated of absorbed when one mole of compound is formed in its standard state from its elements in their standard state is known as standard heat of formatio
Vinegar, orange juice, and battery fluid are familiar acids. Different acids have different acid strengths. Some characteristics of acids are: They taste sour.
Harvesting techniques Many different harvesting techniques are used depending on the place of sale, the type of crop and the stage of maturity of the crop to be harveste
When are conditions right for harvesting a crop? When the crop is ready for harvest, will depend largely on weather conditions and the state of the market. When the deci
The number of d electrons in Fe +2 (atomic number of Fe= 26 ) is not equal to that of the: (1) p-electrons in Ne (At. No.= 10) (2) s-electrons in (At. No.= 12)
Q. How can we obtain Pure alumina? Pure alumina is obtained from bauxite ore. Powdered bauxite mineral is heated in a concentrated solution of sodium hydroxide under pressure w
Calculate how much heat energy is required to raise the temperature of a cube of copper of side 2cm. from 300 to 320k. given: density=8933kg/m cube , atomic weight=63.55, cp=24j/k/
In polar covalent molecule, one atom gets positive charge and the other one takes negative charge as known as dipole.
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