1. . . . . . . . . is found in nature as a free element.
2. Which of the following is not true for the reaction of calcium with water?
3. Using the foarth flotation method consentrating is done to the . . . . . . . . ores.
4. . . . . . . . . metal is extracted only by electrical decomposition.
5. . . . . . . . . is an ore of mercury-
6. Fe3O4 is called
7. Sodium is stored in . . . . . . . .
8. Which of the following is liquid at ordinary temperature?
9. When silver bromide is kept in sunlight . . . . . . . .
10. . . . . . . . . is an alkali metal.
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