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Ions which have the same electronic configuration are those of:
(1) Lithium and sodium
(2) Sodium and potassium
(3) Potassium and calcium
(4) Oxygen and chlorine
Ans: Potassium and calcium
Mixtures can always be separated by physical means. Describe how you would separate the components in a mixture of table salt and sand.
Baeyer's reagent - Tests of unsaturation It is 1% solution consisting of sodium carbonate. It is of pink in colour. An aqueous solution of the element, some drops of Baeyer's
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The frequency of an electromagnetic radiation is 2x 10 6 Hz. . What is its wavelength in metres : (Velocity of light = 3x10 8 ms -1 ) (1)6.0x 10 14
Q. Explain about coordination compound? These compounds are usually formed by the donation of pair of electrons to the central metal ion by the group of ions or molecules. The
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introduction to esters ,preparation, proprties, and their uses in daily life
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