Long Answer Type
Short Answer TypeLong Answer TypeWhat happens when:
(i) Lithium reacts with air
(ii) Lithium reacts with water
(iii) Lithium reacts with halogen
(iv) Lithium reacts with acids?
Short Answer TypeAccount for the following:
(i) Lithium can not form monovalent cation (Li+) easily.
(ii) Lithium iodide is more covalent than lithium fluoride.
How does sodium occur in nature? Name the chief ores of sodium.
Occurrence: Sodium does not occur in nature in the free state due to its very reactive nature. In the combined state, it occurs to the extent of about 2.6% in the earth's crust. The main ores of sodium are:
1. Sodium chloride (NaCl) found as rock salt and in sea water.
2. Sodium nitrite (NaNO3) or Chile saltpetre.
3. Sodium carbonate (Na2CO3)
4. Borax (Na2B4O7 . 10H2O).
Long Answer TypeWhat difficulities arise in the extraction of sodium? How these difficulties are overcome?
Short Answer TypeWhat happens when:
(i) sodium reacts with hydrogen halide,
(ii) sodium reacts with acetylene,
(iii) sodium is heated with hydrogen and
(iv) sodium is treated with mercury ?
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