SSLC Science One marks English Medium - 12. Periodic classification of Elements

Tamilnadu State Board SSLC Science One marks English Medium - (12. Periodic classification of Elements)

12. Periodic classification of Elements

01. The rocky impurity associated with the ore is called........................ ( Ans: gangue )

02. The impurity with ore is .............................. ( Ans: Gangue )
03. The metals which are found is state are........................( Ans: Au, Ag, Pt )
04. The important ore of Aluminium is .........................( Ans: Bauxite , Al₂O₃ .2H₂O )
05. The oxide ore of copper is .......................... ( Ans: Cuprite (Cu₂O )
06. The important ore of Iron is .......................... (Ans: Haematite Fe₂O₃  )
07. The oxide ore of zinc is ..............................( Ans: Zingyte (ZnO) )
08. The Carbonate ore of zinc is .........................( Ans: Celamine  ZnO₃ )
09. The Carbonate ore of calcium is ........................( Ans: marble   CaCO₃   )
10. The Carbonate ore of magnesium is ................ (Ans: Magnesite MgCO₃  )
11. The Carbonate ore of Iron is .........................( Ans: Siderite  FeO₃     )
12. The formula of cryolite is ................................ ( Ans:   Aa₃ Al F₃   )
13. The Ore of calcium fluroide is ............................( Ans: Fluarsar  CaF₂  )
14. The ore of silver chloride is ......................... (Ans: Horn Silver  AgCl )
15. The rock salt is .....................     ( Ans: NaCl )
16. The important ore of mercury is .......................... (Ans: Cinna bar (HgS) )
17. The important ore of lead is ......................... ( Ans: Galena (PbS) )
18. The important ore of Zinc is ........................ ( Ans: Zinc blende ( ZnS ) )
19. The sulphide ore of Iron is ..................( Ans: Iron pyrite (Fe₂S ) )
20. ................... is the most abudent meal in the earths crust. (Ans: Aluminium )
21. The metal which produced by the process Hall's electrolytic reduction ............. (Ans: Aluminium )
22. The pure aluminium deposits at ....................... by Hall's process. (Ans: Cathode )
23. The ............... is  the acid which the aluminium will not treat.     ( Ans: dil.con. Nitric acid )
24. The alloy which the aeroplan parts are made from .................. because it is very ..............   ( Ans: Duralumin , light )
25. The important ore of coper is ......................... ( Ans: Copper pyrite ( CuFeS₂  ) )   
26.  The important sulphide ore of copper is ................... (Ans: Copper Glance ( Cu₂S ) )          
27. The copper ore is concentrated by the method of .................... (Ans: Froth flotation process )
28. The past product of matt during bassemerisation is ......................... (Ans:  Cu₂S +FeS )
29. The percentage of blister copper is .................... (Ans: 98 % )
30. The reddish brown colour metal is .................. ( Copper )
31. ................... is the metal used to make electric  cables and electric appliances. (Ans: Copper )
32. ................... is the metal used to make utensil , containers, colorimeter, coins and electroplating .  ( Ans: Copper )
33. ..................... is alloyed with gold and silver for making coins and jewels.    ( Ans: Copper )
34. ................... is the metal gryist white in colour.   (Ans: Iron )
35. ....................is the second most abudent metal.  ( Ans: Iron )


    

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