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How do you account for the following:
(a) All scandium salts are white. (At. No. of Sc = 21)
(b) The first ionization energies of the 5d transition elements are higher than those of the 3d and 4d transition elements in own groups.
color formation of d-block elements
how do you calculate the mass atomic number of an element?
The postulate of Bohr theory that electrons jump from one orbit to the other, rather than flow is according to : (1) The quantisation concept (2) The wave nature of elect
State the Functions of oxide layer (i) To mask against diffusion or ion-implant, (ii) To passivate surface electrically and chemically. (iii) To isolate one device from a
example of two component with different composition
Ionic and covalent bonds are present in: (1) CCl 4 (2) CaCl 2 (3) NH 4 Cl
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Q. Define Conjugate acid-base pair and buffer? Buffers are substances that resist changes in pH. To "balance pH" means to buffer. Weak acids and bases make good buffers.
Which carbonate mineral reacts readily with cool dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas? Many carbonate minerals.
explain main reason for boiler corrosion ?
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