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Elements and Compounds
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Elements and Compounds
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25 Questions

1. Which one of the following is most metallic?
2. Which of the following has never positive oxidation state here?
3. The first ionization potential in electron volt of nitrogen and oxygen atoms are respectively given by
4. Which is the most abundant element on the earth's crust?
5. The colour of hydrogen is
6. Atomic radii of fluorine and neon in angstrom unit are, respectively
7. Which of the following noble gases is least polarizable?
8. The screening constant for a 3 d-electron is zinc atom (Z = 30) is
9. Which molecule contains both polar and non-polar covalent bonds?
10. Which element is most abundant on earth's crust?
11. In Kroll nad I.C.I. process of the production of titanium, the inert gas used is
12. Alkali metals can form highly stable complexes with
13. Which one of the following element has non-spherical outermost subshell?
14. Which one of the following forms least ionic chloride?
15. Silicon exhibits diagonal relationship with
16. Which of the following alkali metals has the polarizing power close to that of magnesium?
17. If the atomic number of an element is 33, it will be placed in Mendeleev's periodic table in the
18. Which one of the following is strongest oxidizing agent?
19. The metal used in incandescent lamps is
20. Ozone turns starch iodide paper
21. Melting point is lowest for
22. Arsenic is detected by
23. Ammonia is dried over
24. The most malleable of all the metals is
25. Density is highest for

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