Question

Which metal is used as a reducing agent in smelting ? 1) C 2) Al 3) Zn 4) None 4. Which of the following is not found in free state? 1) Cu 2) Na 3) Au 4) Ag 5. Among the following groups of oxides, the group that cannot be reduced by carbon to give the respective metals is 1) Cu2O, K2O 2) Fe2O3 , ZnO 3) CaO, K2O 4) PbO, Fe3O4 6. One of the following metals forms a volatile compound and this property is taken as an advantage for its extraction. This metal is __________ 7. Among the metals, Li, Ca and Al the most powerful reducing agent is _____ 8. Among Na, Al and K, the metal with the highest melting point is _____. 9. Fe and Zn are distinguished by 1) H2O 2) HCl 3) Alcohol 4) NaOH 10. Which of the following reacts most vigorously with water? 1) Na 2) K 3) Cs 4) Rb

Answer 1

Answer:

1)Al

4)Na

5)Fe²O3,ZnO

6)Nickel

7)Al

8)Al

9) Alcohol

10)K