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Unit15 p-block elements qns

Unit15 p-block elements qns - 1 UNIT 15 P block elements...

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1 QUEST TUTORIALS Head Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439 UNIT 15 P – block elements Sub groups 13, 14, 15, 16, 17 1. The electronic configuration of thallium is (a) (Ar) 3d 10 4s 2 4p 1 (b) (Kr) 4d 10 5s 2 5p 1 (c) (Xe) 5d 10 6s 2 6p 1 (d) none of these 2. Gillium and Indium follow (a) 1st transition series (b) 2nd transition series (c) 1st and 2nd transition series (d) 3rd transition series 3. Thallium show variable valency or different oxidation states because 4. Which of the following oxides is more stable than the other ? 5. Gallium and Indium are used to dope germanium to produce 6. A silvery white metal is solid in cold days but liquefies on hot day, and reacts with dilute Hcl to give H 2. It can be (a) Sn (b) Sb (c) Bi (d) Ga 7. Borax has the formula 8. When borax is heated with Cobalt nitrate, a blue bead is formed. The bead consists of 9. Which metal is usually obtained from its ore by electrolytic reduction? 10. Al. is a self - protecting metal because (a) it never tarnishes (b) it develops a carbonate Coating (c) it develops an oxide coating (d) it is inert
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